Disentangling orbifold data
May 13-17, 2024,
From Analysis to Homotopy Theory,
A conference in honor of Ulrich Bunke's 60th birthday,
Alfried-Krupp Wissenschaftskolleg, Greifswald,
Germany
The complex elliptic genus for ADE-type singularities
March 18-22, 2024,
Workshop on New Directions in Conformal Field Theory,
twin meeting between the University of Hamburg and the Fields Institute, Toronto,
University of Hamburg, Germany
University of Hamburg, Germany
Symmetries of Z3-orbifold K3s
March 07, 2024,
School Seminar, School of Mathematical & Statistical Sciences, University of Galway,
Galway, Ireland
Z3-orbifold K3s
January 06, 2024,
Joint Mathematics Meetings,
session on Mock and quantum modular forms and physics,
San Francisco, USA
Z3-orbifold limits of K3
December 12, 2023,
SFB Lecture, SFB Higher Invariants - Interactions between Arithmetic Geometry and Global Analysis,
University of Regensburg, Germany
Generic data can refine invariants
October 25, 2023,
Mathematical Sciences Seminar, University College Cork, Ireland
The Gepner construction from a modular point of view
October 04-06, 2023,
Women in Automorphic Forms 2023, University of Konstanz, Germany
K3 surfaces and their avatars in conformal field theory
September 25-28, 2023,
DMV Jahrestagung 2023, TU Ilmenau, Germany
Some quartic K3 surfaces
September 1, 2023,
36th Annual Meeting of the Irish Mathematical Society, University of Limerick, Ireland
K3 - where geometry meets conformal field theory
May 11, 2023,
Inaugural Lecture, Trinity College Dublin, Ireland
On generic features in geometry
April 3-6, 2023,
74th British Mathematical Colloquium, University of Bath, UK
Invariant versus generic
March 29, 2023,
Colloquium at the Department of Mathematics and Statistics at Maynooth University,
Ireland
Quarter BPS states in K3 Theories
March 9, 2023,
GAPT Semiar, Mathematics Institute, Cardiff University, Wales
An application of folding ADE to BCFG
January, 9-13, 2023,
invited joint talk presented at the workshops
"Quivers, Clusters, Moduli and Stability -
a conference in honor of Alastair King's 60th birthday",
and
"Algebraic Geometry, Gauge Theory and the Swampland Conjectures -
Meeting of the
Simons Collaboration on Special Holonomy in Geometry, Analysis, and Physics"
at the University of Oxford, UK
Modular Forms
December 2022,
Lecture course delivered at the Waseda "Super Global Program",
Waseda University, in Tokyo, Japan
Invariants obtained by 'counting' BPS states in two dimensions
September 7-9, 2022,
Minicourse delivered at the Andrejewski Days on "Quivers, Representation Theory and Physics"
in Cologne, Germany
Elliptic genera for ADE
July 28 - August 2, 2022,
Workshop "Operator Algebras: Subfactors, K-theory and Conformal Field Theory"
in honour of David Evans' 70th birthday,
Gregynog Hall, Wales
A geometric interpretation of Z3 orbifoldings
July 15 - 22, 2022,
Workshop "Modular Forms and Representation Theory",
Manigod, France
SU(2) channels the cancellation of K3 BPS states
June 13 - 17, 2022,
Bundles and Conformal Blocks with a Twist
at the ICMS, Edinburgh, Scotland
How do quarter BPS states cease being BPS?
June 6 - 10, 2022,
Vertex Algebras and Representation Theory
at CIRM, Luminy, France
The complex elliptic genus
May 16-20, 2022, Minicourse delivered at
the Spring School on Field Theories and Algebraic Topology, Driebergen, The Netherlands
Geometric properties of simple surface singularities
April 22, 2022, Staudt-Kolloquium, Erlangen, Germany
The complex elliptic genera of simple surface singularities
March 21-25, 2022, Workshop on Representation Theory, Vertex and Chiral Algebras, IMPA, Rio de Janeiro, Brazil
Lecture series on
Modular Forms
August 12-20, 2021, ICTP Summer School in Kigali, Rwanda,
delivered online due to Covid-19 measures
Towards a generic space of BPS states for K3
May 31 - June 5, 2021,
An online event virtually at the Kavli IPMU (University of Tokyo)
The complex elliptic genera of simple surface singularities
April 14, 2021,
DIAS theoretical physics seminar (via zoom)
Counting half and quarter BPS states - and their geometric counter parts
February 24, 2021,
AGQFT Seminar (via zoom)
On invariants shared by Geometry and Conformal Field Theory
December 08, 2020,
One World IAMP Mathematical Physics Seminar (via zoom)
Folding ADE-type integrable systems
February 06, 2020,
Département de Mathématiques de l'IRIMAS
Séminaire de Mathématique et Colloquium,
Mulhouse, France
ADE-type integrable systems and how to fold or orbifold them
January 31, 2020,
Colloquium, School of Mathematics,
Edinburgh, Scotland
A pathway to quantum field theory
November 19, 2019,
Mathematics Colloquium,
Augsburg, Germany
Folding Hitchin integrable systems and orbifolds
September 9 - 13, 2019,
GEOQUANT 2019,
Taipei, Taiwan
BCFG Hitchin integrable systems via orbifoldings
July 29-August 2, 2019,
Conference on Integrability, Geometry and Moduli,
in honor of Motohico Mulase's 65th birthday,
Max Planck Institut für Mathematik, Bonn, Germany
Moonshine Phenomena
July 11, 2019,
Kolloquium Wilhelm Killing,
Mathematics Institute, Münster, Germany
Representations of Moonshine
June 22, 2019,
BMS Kovalevskaya Colloquium,
Berlin Mathematical School, Berlin, Germany
On generic structures of K3 theories
June 10-14, 2019,
The Mathematical foundations of conformal field theory
and related topics, A conference in honor of Yi-Zhi Huang,
Chern Institute of Mathematics, Tianjin, China
On Invariants shared by Geometry and Conformal Field Theory
March 8, 2019,
Program on ''Geometry and Physics of Hitchin Systems'',
Simons Center for Geometry and Physics, Stony Brook, USA
K3 Surfaces and Mathieu Moonshine
February 27 - March 1, 2019,
MPS Conference on Number Theory, Geometry, Moonshine and Strings III,
Simons Foundation, New York City
On generic superconformal field theories on K3
February 11-15, 2019,
Quantum Structure of Spacetime,
Bratislava, Slovakia
Hodge elliptic genera - or how to refine the complex elliptic genus
December 4, 2018,
Utrecht Geometry Center GAGA Seminar,
Mathematical Institute, Universiteit Utrecht, The Netherlands
Hodge elliptic genera in geometry and in CFT
September 24-28, 2018,
Geometric and Categorical Aspects of CFTs,
Banff International Research Station, Oaxaca, Mexico
Mathieu Moonshine from a Conformal Field
Theorist's point of view
September 5-7, 2018,
Workshop "Women in automorphic forms",
Darmstadt, Germany
A natural refinement of the Euler characteristic
August 13-17, 2018,
Double-Conference on Higher algebra and Mathematical Physics,
MPI für Mathematik Bonn, Germany
Hodge elliptic genera
July 23-27, 2018,
Lecture series presented during the Thematic Program on
Arithmetic Geometry and Quantum Field Theory, Korea
Institute of Advanced Study, Seoul, Republic of South Korea
Spieglein, Spieglein, wie stell ich Dich dar?
June 15, 2018,
Gauß-Vorlesung der DMV, Oldenburger Schloss, Oldenburg
Invariants of superconformal field theory
June 4-8, 2018,
QUANTMOD 2 - Quantization and Moduli Spaces, Luxembourg
K3 theories and how to reflect some of them
to vertex operator algebras
April 12-13, 2018,
Workshop on 'Conformal field theory and categorical structures,
beyond rationality', Woudschoten, The Netherlands
Elliptic genera for K3 and beyond
March 6, 2018,
CBS Center for Geometry and Physics, Pohang, Republic of South Korea
Symmetrien und ihre Identifikation in der
konformen Feldtheorie
February 23, 2018,
Akademie der Wissenschaften und der Literatur, Mainz, Germany
Refinements of the Euler characteristic, old
and new
Geometry, Groups and Topology Seminar,
January 30, 2018,
Karlsruher Institut für Technologie, Germany
New invariants from CFT, and how solving the
heat equation helps
Final Colloquium of the GRK 1463 "Analysis, Geometry and String Theory",
December 15, 2017,
Hanover, Germany
Refining the complex elliptic genus
Integrable Day: "Modular Forms and Applications",
November 24, 2017,
Loughborough, UK
Workshop on Automorphic Forms, Mock Modular Forms and String Theory,
October 29 - November 3, 2017,
Banff International Research Station, Banff, Canada
From the heat kernel to conformal field theory
Analysis-Seminar Augsburg-Munich,
October 26, 2017,
Augsburg, Germany
Hodge elliptic genera
The Analysis of Gauge-Theoretic Moduli Spaces,
August 27 - September 1, 2017,
Banff International Research Station,
Canada
Hodge elliptic genera and how they govern K3 theories
Special session on Calabi-Yau Manifolds and Calabi-Yau Algebra
of the Mathematical Congress of the Americas,
July 24 - 28, 2017,
Montréal,
Canada
On partition functions and their elliptic cousins in conformal field theory
Workshop on Mathematical Physics and Spectral Theory,
May 16 - 18, 2017,
University of Metz,
France
Vertex operator algebras from Calabi-Yau geometries
Workshop on subfactors, higher geometry, higher twists and almost
Calabi-Yau algebras,
March 27-31, 2017,
Isaac Newton Institute, Cambridge, UK
Reflections on K3 theories
String Seminar, Instituto Superior Técnico,
February 27, 2017,
Lisbon, Portugal
K3 theories and modular forms
Workshop on
Modular Forms and Black Holes
January 9 - 14, 2017,
Bhubaneswar, India
On a special K3 theory
Workshop on
New Developments at the Interface Between
Geometry and Physics
December 19 - 20, 2016,
Bath University, UK
An Introduction to Conformal Field Theory for Mathematicians
Lecture Series delivered at the Introductory Workshop of the MATRIX Program:
Interactions between topological recursion, modularity, quantum
invariants and low-dimensional topology
November 28 - December 2, 2016,
Melbourne University, Australia
Reflecting a special K3 theory
Moonshine and K3 surfaces
November 7 - 11, 2016,
Nagoya University, Japan
Vertex operator algebras for K3
Automorphic forms,
Mock modular forms and string theory,
August 29 - September 2, 2016,
Simons Center for Geometry and Physics, Stony Brook, USA
Can singularities govern conformal field theory?
Differential Geometry and its Applications
July 11 - 15, 2016, Brno, Czech Republic
From catastrophes to conformal field theory
June 30, 2016, Vortragsreihe des
Graduiertenkolleg 1493 "Mathematische Strukturen in der modernen
Quantenphysik",
University of Göttingen, Germany
University of Göttingen, Germany
Konforme Feldtheorie und ihr Einsatz in der
Geometrie
June 2, 2016, Antrittsvorlesung, University of Freiburg, Germany
Moduli and modular forms in conformal
field theory
Moduli and Automorphic Forms:
A Meeting for Women in Mathematics
May 12 - 14, 2016, Berlin, Germany
Complex Geometry and Mathematical Physics
March 5 - 7, 2016, DFG-AIMS Workshop,
Dakar, Senegal
Simple singularities have an ADE-classification - what's next?
January 9 - 13, 2016, Moduli spaces, integrable systems,
and topological recursions,
CRM Montreal, Canada
An application of singularity theory in conformal field theory
August 31 - September 4, 2015,
The 17th EWM General Meeting in Cortona, Italy
Towards vertex operator algebras of K3
August 14-18, 2015,
Lie Algebras, Vertex Operator Algebras and Related Topics, A Conference in honor of J. Lepowsky and R. Wilson, at the University of Notre Dame, South Bend, USA
The elliptic genus - a view from conformal field theory
July 27-31, 2015, Symposium on
Metric and analytic aspects of moduli
spaces, at the Newton Institute in Cambridge, UK
Supersymmetry decomposes the virtual bundle that underlies the elliptic genus
June 10-13, 2015,
2015 International AMS-EMS-SPM
Meeting, Session 25
on "Geometrical and enumerative structures in supersymmetry", at Porto, Portugal
Symmetrien und die Kunst, sie anzuwenden
May 12, 2015, Freiburger Kolloquium der Studienstiftung des deutschen Volkes, at Freiburg, Germany
How does extended supersymmetry affect the elliptic genus?
April 13-17, 2015,
(Mock) Modularity, Moonshine and String Theory,
at the Perimeter Institute for Theoretical Physics, Waterloo, Canada
The elliptic genus revisited
October 27-31, 2014,
Higher Structures in Geometry and Physics 2014,
Geneva, Switzerland
Mathieu Moonshine: Facts and Fantasies
September 22-26, 2014,
The String
Theory Universe, Mainz, Germany
The elliptic genus in conformal field theory
September 1-5, 2014,
VBAC 2014 - Algebraic varieties: Bundles, Topology, Physics, Berlin, Germany
On Mathieu Moonshine
July 14-18, 2014,
30th International Colloquium on
Group Theoretical Methods in Physics, Ghent, Belgium
An instance of mirror symmetry on K3
June 15-20, 2014,
Workshop on Quantum
Curves and Quantum Knot Invariants, Banff, Canada
Mathieu Moonshine on K3
June 14, 2014, Workshop on Calabi-Yau Manifolds and their Moduli, Satellite Meeting to the StringMath 2014, Edmonton, Canada
The elliptic genus of K3: From index theory to conformal field theory I and II
May 29-30, 2014, Workshop on
Recent Developments in
Moonshine, Gothenburg, Sweden
The elliptic genus of K3 and how it comes in useful in quantum field theory
May 24, 2014, Felix Klein Colloquium, Leipzig University, Germany
The elliptic genus of K3 and CFT
April 14-18, 2014, International Workshop on
Mock Modular Forms and Physics,
IMSc, Chennai, India
From conformal geometry to conformal field theory
January 29, 2014, Mathematics Colloquium, University of Potsdam, Germany
Moonshine - or how to distill geometry from conformal field theory
January 14, 2014, Mathematics Colloquium, University of Erlangen, Germany
Symmetry-surfing the moduli space of Kummer K3s II
September 6, 2013, Program in
Mock Modular Forms, Moonshine,
and String Theory, Simons Center for Geometry and Physics, Stony Brook, USA
Lecture Course: K3 Surfaces: Geometry, conformal field theory and number theory
August 19-23, 2013,
GEOQUANT 2013 School on Geometry
and Quantization, ESI Vienna, Austria
Lecture Course: Algebraic Geometry and Conformal Field Theory
July 15-31, 2013, Summer School on
Geometric, Algebraic
and Topological Methods for Quantum Field Theory, Villa de Leyva, Colombia
Moonshine in Mathematics and String Theory
July 4, 2013, Bethe Colloquium, Physics Institute, Bonn, Germany
The elliptic genus of K3
May 24-27, 2013, Bayrischzell Workshop 2013
Quantization, topological models
and generalized geometries, Bayrischzell, Germany
Mathieu Moonshine for K3
April 23, 2013, Integrable Systems and Mathematical Physics
Seminar, University of Glasgow, Scotland
A twist in the Mathieu Moonshine Story
April 7, 2013,
Southeast
Regional Math/Strings Meeting, Duke University, USA
A binary view on Kummer K3s and Mathieu-Moonshine
January 21, 2013, Mathematics Colloquium, University of Stuttgart, Germany
A constructive approach to Mathieu Moonshine
November 23, 2012, Heilbronn Day:
Modular Forms, Geometry
and Physics, ICMS Edinburgh, UK
A binary view on Kummer K3s and M
24
-Moonshine
November 15, 2012, Mathematics Colloquium, University of
Geneva, Switzerland
Mathematical foundations of conformal field theory and applications
(lecture series), October 26 - November 4, 2012, COPROMAPH International School, Cotonou, Benin
Geometric aspects of Mathieu moonshine
September 3-7, 2012,
Heilbronn
Workshop on String Theory and Arithmetic Geometry, Bristol, UK
Large subgroups of M
24
form overarching symmetry groups of K3
July 16-21, 2012,
StringMath
2012, Bonn, Germany
Singularitätentheorie als geometrischer Zugang zur topologischen Quantenfeldtheorie
July 10, 2012, Augsburger Mathematisches Kolloquium, Augsburg, Germany
A geometric approach to topological quantum field theory
July 1, 2012, Joint EMS/EWM Survey Lectures, European
Women in Mathematics at the 6ECM, Krakow, Poland
Singularities and topological quantum field theories
June 28, 2012, Mathematisches Kolloquium, Universität Münster, Germany
On symplectic automorphisms of K3 surfaces and their associated conformal field theories
June 4-8, 2012, Conference on Symplectic Geometry and Mathematical Physics, Beijing Center for Mathematical Physics, Beijing, China
Von Singularitätentheorie zur topologischen Quantenfeldtheorie
May 31, 2012, Gemeinsames Kolloquium der Mathematik und Physik,
Universität Heidelberg, Germany
The overarching finite symmetry group of Kummer surfaces in the Mathieu group M
24
May 23, 2012, Köln-Bonn Oberseminar Zahlentheorie und Physik,
MPI Bonn, Germany
A geometric approach to topological quantum field theories
April 4, 2012, Hausdorff-Kolloquium, Mathematics Institute, Universität Bonn, Germany
On symmetries of K3, its associated CFTs and the Mathieu group M
24
February 27, 2012, Oberseminar Algebraische Geometrie, Universität Zürich, Switzerland
Von Katastrophen und anderen Singularitäten
January 17, 2012, Didaktisches Seminar, Freiburg, Germany
On K3 surfaces in physics and geometry
December 9, 2011, Mathematisch-Physikalisches Kolloquium, Freiburg, Germany
Singularitäten und topologische Quantenfeldtheorien
December 7, 2011, Mathematisches Kolluquium
, TU München, Germany
Symmetries of K3 and the automorphisms of the Golay code
November 28, 2011, Oberseminar Differentialgeometrie, Münster, Germany
Kummer K3 surfaces and the automorphism group of the Golay code
November 14-15, 2011, Trends and Perspectives in Mathematics, Tel Aviv, Israel
K3 surfaces and the Mathieu group M
24
October 30-November 4, 2011,
Chern Centennial Conference, MSRI Berkeley, USA
On catastrophes and related singularities
October 6-8, 2011, International SimTech Symposium Partial Differential Equations: Theory, Applications, Simulations, Stuttgart, Germany
Topological field theories and integrable systems
July 25-29, 2011,
The 4th International Workshop on Nonlinear Mathematical Physics and The 11th National Conference on Integrable Systems, Wuhan, China
K3 Flächen, deren Symmetrien und was sie mit Codes zu tun haben
July 13, 2011, Mathematisches Kolloquium, Eberhard-Karls-Universität Tübingen, Germany
From the K3-lattice to the (A
1
)
24
-Niemeier lattice
July 7-9, 2011, Mathieu Moonshine Meeting, ETH Zurich, Switzerland
K3 Flächen, deren Symmetrien und was sie mit Codes zu tun haben
June 17, 2011, Mathematisches Kolloquium, Goethe-Universität Frankfurt, Germany
From the Golay Code to K3-surfaces and their associated conformal field theories
April 28, 2011, Maths and Appications Sussex Seminar at the University of Sussex, UK
Die Geometrie von Singularitäten und Quantenfeldtheorien
April 1-2, 2011,
Tagung deutschsprachiger Mathematikerinnen 2011
at the RWTH Aachen, Germany
Symmetries of K3 in M
24
: I Geometry
February 28 - March 18, 2011,
School and Conference on Modular Forms and Mock Modular Forms and their Applications in Arithmetic, Geometry and Physics
at the ICTP, Trieste, Italy
Von K3 bis M
24
January 20, 2011, Mathematics Colloquium, University of Mainz, Germany
Lattices, their symmetries, and how they affect conformal field theories on K3
December 20, 2010, Theoretical Physics Seminar, Londrina University, Brazil
The symmetries of K3 surfaces and their implementation in conformal field theory
December 13-17, 2010, Second Latin Congress on Symmetries in Geometry and Physics in Curitiba, Brazil
What is a K3 surface - and how can it be used in physics?
December 3, 2010, Deutsches Haus für Wissenschaft und Innovation des DAAD, Moscow, Russia
On Kummer surfaces, the Mathieu group M
24
, and conformal field theory
November 24, 2010, Algebraic and Geometry Seminar, University of Bristol, UK
On Kummer surfaces, the Golay code, and conformal field theory
November 9, 2010, Algebraic Geometry Seminar, Università di Milano, Italy
On the symmetries of K3 surfaces
September 13 - 16, 2010,
Courant Colloquium 2010, Göttingen, Germany
On the geometry of singularities in quantum field theory
August 19 - 27, 2010,
International Congress of Mathematicians 2010,
Hyderabad, India
Quantum field theories and the geometry of singularities
July 26 - 30, 2010, The XXVIII International Colloquium on Group-Theoretical Methods in Physics, Newcastle, UK
Von Singularitäten zu topologischen Quantenfeldtheorien
July 13, 2010, Fakultätskolloquium der Fakultät Mathematik und Physik, Leibniz-Universität Hannover, Germany
On K3 surfaces and their applications in physics
June 27 - July 3, 2010, XXIX Workshop on Geometric Methods in Physics, Bialowieza, Poland
K3 erklimmen? Von der Basis in der klassischen Optik bis zum Gipfelpanorama in Geometrie und Quantenfeldtheorie
May 7, 2010, Lecture series "frauen, die forschen", University of Kiel, Germany
TQFT & singularities from a conformal field theorist's point of view
April 15, 2010, COW seminar
in Cardiff, Wales
On singularities and conformal field theory
April 12, 2010, Mathematics Colloquium, University of Durham, UK
On singularities and modularity
March 14-19, 2010,
Global Analysis and Automorphic Forms
- On the Occasion of the 60th Birthday of Werner Müller in Jerusalem, Israel
Conformal field theories on Borcea-Voisin 3-folds
December 17-18, 2009,
Workshop on Algebraic and Topological Aspects of D-branes
in Würzburg, Germany
Eine mathematische Entdeckungsreise zu K3
November 25, 2009, Kolloquium des Fachbereiches Mathematik, TU Darmstadt, Germany
Encounters with conformal field theory
November 20-21, 2009,
Advances in Theoretical Physics
- A conference in honour of Professor Werner Nahm in Dublin, Ireland
A Hiker's Guide to K3
November 4, 2009, Dresdener Mathematisches Seminar, Dresden, Germany
How to attach gauge theory data to elliptic fibrations
September 14-18, 2009, Workshop on Algebraic Geometry and Physics (WAGP 2009)
Representations, Lie Theory and Physics
in Maresias, Brazil
Asymptotic analysis for unitary conformal field theories
September 7-11, 2009, Third International Conference on Geometry and Quantization
GEOQUANT
at the University of Luxembourg, Luxembourg
(0,4) lessons for (0,2)
August 17-21, 2009,
(0,2) Mirror Symmetry and Quantum Sheaf Cohomology, Potsdam, Germany
A discovery tour to K3
August 5, 2009, Mathematics Colloquium, St. Patrick's College, Dublin, Ireland
The symmetries of K3, and how to build conformal field theories from them
July 19-24, 2009, Symmetries in science, Bregenz, Austria
An explicit construction of superconformal field theories on certain Calabi-Yau 3-folds
July 6-9, 2009, XIII International Conference
Symmetry Methods in Physics, Dubna, Russia
Geometrische Aspekte von Quantenfeldtheorien
June 27, 2009, Mathematics Institute, TU Munich, Germany
Geometrische Anwendungen von Quantenfeldtheorien
June 19, 2009, Mathematics Institute, Freiburg i.Br., Germany
The geometry of conformal field theory
June 8-20, 2009, RTG Graduate Summer School
Geometry of Quantum Fields and
Strings, University of Pennsylvania, Philadelphia, USA
Lecture series on K3 surfaces and CFT
April 6-8, 2009, Graduate workshop:
K3 surfaces and multigraded rings, University of Warwick, UK
A classification of a family of free fermionic orbifold models
March 30, 2009, Duke-UNC String theory seminar, UNC Chapel Hill, USA
How are intersection numbers governed by representation theory?
January 20, 2009, Oberseminar Geometrie, LMU München, Germany
From dualities to intersection theory
January 16, 2009, Scottish topology colloquium, University of Edinburgh, Scotland
Applications of a string-string duality
December 15-22, 2008, First Cuban Congress on Symmetries in Geometry and Physics, Havana, Cuba
Symmetrien und die Kunst, sie anzuwenden
October 23, 2008, public lecture for the Year of Mathematics, Zeughaus Augsburg, Germany
On explicit SCFT constructions for certain Calabi-Yau varieties
September 17, 2008, Korean Institute of Advanced
Studies, Seoul, Republic of South Korea
On orbifolds and free fermion constructions
September 8-12, 2008, International Workshop
From integrable structures to topological strings and back, SISSA, Trieste, Italy
How are intersection numbers governed by representations of Lie algebras?
August 13-19, 2008, XXVII Intl. Colloquium on
Group Theoretical Methods in Physics, Yerevan, Armenia
Die Geometrie topologischer Quantenfeldtheorien
July 4, 2008, Honorary speech at the annual celebration of the University of Augsburg, Germany
On some implications of string-string dualities
June 30 - July 4, 2008, The manifold geometries of quantum field theory, Hausdorff Center for Mathematics, Bonn, Germany
Extending the geometry of certain Calabi-Yau varieties
May 12-13, 2008, Irish Geometry Conference 2008, IT Tralee, Ireland
Conformal field theory: From physics to mathematics
April 29, 2008, Seminar zur Theorie der kondensierten Materie, Physikalisches Institut, Augsburg, Germany
From dualities to geometry
March 14-20, 2008, International Conference on Geometry and Analysis on Manifolds, Santa Barbara, USA
How to implement special properties of K3 surfaces in conformal field theory
February 15, 2008, Algebraic and complex geometry seminar, Osaka, Japan
How to lift a construction by Hiroshi Inose to Conformal Field Theory
February 12, 2008, IPMU Seminar, University of Tokyo, Japan
Eine mathematische (Ein-)führung zu K3
February 1, 2008, Bonner Mathematisches Kolloquium, Bonn, Germany
Geometry and beyond for K3 and one of its higher dimensional cousins
January 17, 2008, ZMP Kolloquium, University of Hamburg, Germany
On K3-surfaces and beyond - from a geometer's and a conformal field theorist's point of view
November 22, 2007, Oberseminar Algebraische Geometrie, Hanover, Germany
How do twisted indices on K3 relate to intersection numbers in Calabi-Yau threefolds?
October 26, 2007, Workshop in memory of Andrei Tyurin, Steklov Institute, Moscow, Russia
Schritt für Schritt auf dem Weg zu K3
October 23, 2007, Antrittsvorlesung, University of Augsburg, Germany
Quantum field theory as an aid to geometers
September 24, 2007, Mathematics seminar, IISc Bangalore, India
Quantum field theory as an aid to geometers
September 19, 2007, Mathematics seminar, IIT Bombay, India
Quantum field theory as an aid to geometers
August 29 - September 2, 2007,
ICTAMI07, Alba Iulia, Romania
On the relation between Conformal Field Theory and Geometry
August 26-31, 2007, International Conference on
Symmetries in String Theory, Ascona, Switzerland
The topology and geometry of certain quotient singularities - some new techniques
August 19-25, 2007, The Eighth International Workshop on
Differential Geometry and its
Applications, Cluj, Romania
What do quartic K3 surfaces have in common with orbifold limits of K3?
July 3, 2007, Oberseminar Geometrie, LMU München, Germany
A reversal of sigma model constructions
June 24-30, 2007,
Symmetry in
Nonlinear Mathematical Physics, Kiev, Ukraine
A reversal of sigma model constructions
June 18-24, 2007, VII. International Workshop
Lie Theory and its Applications in
Physics, Varna, Bulgaria
'Nearly attractive' K3-surfaces - describing and generalizing Kähler-Einstein metrics on them
June 6, 2007, Oberseminar Globale Analysis, Bonn, Germany
Eine elementare Diskussion von T-Dualität und Spiegelsymmetrie
May 5, 2007, Mathematisches Kolloquium, Regensburg, Germany
From dualities to geometry
April 16-19, 2007,
British
Mathematical Colloquium 2007, Swansea, Wales
From index theory to intersection numbers
April 8-14, 2007, International Conference on
Geometry and Analysis on Manifolds, Tianjin, China
The imprint of dualities in complex geometry
March 25-30, 2007, Minisymposium
Globale Analysis, DMV Jahrestagung 2007, HU Berlin, Germany
How to construct deformations of the (2)
4
Gepner model on smooth K3 surfaces
March 5, 2007, Theory Seminar, CEA Saclay, France
K3 surfaces, and how to construct associated conformal field theories
January 24, 2007, Forschungsseminar "Geometrische Analysis und Spektraltheorie'', HU Berlin, Germany
Spezielle quartische K3-Flächen und assoziierte 'metageometrische' Strukturen
December 14, 2006, Kolloquium des GK ατμγ, Münster, Germany
Approaching Geometry from Conformal Field Theory
November 16, 2006, Mathematical Physics Seminar, Zürich University, Switzerland
Verallgemeinerte Laplace-Operatoren als Schlüssel zur geometrischen Dekodierung konformer Feldtheorien
October 7, 2006, Workshop "Anwendbare Analysis", Stuttgart, Germany
Towards the boundary of spaces of conformal field theories
July 27, 2006,
IGA satellite workshop
to Mathematics of String Theory, Adelaide, Australia
A family of superconformal field theories hosting all "very attractive" relatives of the (2)
4
Gepner model
July 21, 2006, Workshop on Mathematics of String Theory, Canberra, Australia
Anomaly cancellation in the light of heterotic - type IIA string duality
July 14-17, 2006, minicourse at the Instructional Program of Mathematics of String Theory, Canberra, Australia
The Monster and String Theory
May 24, 2006, LIMS Evening lecture, Lighthill Insitute of Mathematical Sciences, London, UK
A scenic view of K3
May 19, 2006, Mathematics Colloquium, University of Kent, UK
"Nearly attractive" K3 surfaces and associating SCFTs to them
May 4, 2006, Algebra Seminar, Kansas State University, USA
Z
4
orbifold limits of K3 and a family of smooth quartic K3s: A nonclassical duality
December 1, 2005, Duke-UNC String theory seminar, Duke University, USA
A duality between "nearly attractive" quartic K3s and Z
4
orbifold limits of K3
November 16, 2005, Geometry Seminar, Boston University, USA
On some quartic K3 surfaces, their natural metrics, and their natural associated SCFTs
August 20-26, 2005, XXIII Int. Conf. on
Differential Geometric Methods in Theoretical Physics, Tianjin, China
Anomalien - eine Anwendung klassischer Indexsätze im Rahmen nichtklassischer Dualitäten
July 8, 2005, Mathematics Institute, Augsburg, Germany
On a family of smooth algebraic K3 surfaces and their associated CFTs
May 18-20, 2005,
Journées de géométrie algébrique, Lille, France
How to construct SCFTs associated to a family of smooth quartic K3 surfaces
May 4, 2005, Triangle Seminar London, UK
A survey of K3 from a conformal field theorist's point of view
February 7, 2005, Dublin Theoretical Physics Colloquium, School of Mathematics, Trinity College Dublin, Ireland
Approaching geometry through conformal field theory
January 27, 2005, Warwick theory group seminar, Department of Physics, University of Warwick, UK
On the "very attractive" relatives of the Fermat quartic and conformal field theories associated to them
December 1, 2004, Deformation theory seminar, Department of Mathematics, University of Pennsylvania, Philadelphia, USA
Endliche Spiegelungsgruppen und die Allgegenwart von ADE-Klassifikationen
November 19, 2004, Kolloquiumsreihe der Mathematischen Gesellschaft Göttingen, Germany
K3: Eine mathematische Wanderung von Geometrie zu konformer Feldtheorie und zurück
October 21, 2004, Kolloquiumsreihe der Mathematischen Gesellschaft Göttingen, Germany
Conformal field theories, their limits and their geometric interpretations
October 1, 2004, Math/Physics seminar, University of Pennsylvania, Philadelphia, USA
From large level to large volume limits and their geometric interpretations
September 22-25, 2004, 6th Bologna Workshop on
CFT and Integrable Models, Bologna, Italy
On a family of SCFTs associated to quartic K3 surfaces
September 6-10, 2004, Workshop on
Complex Geometry in Physics, ICMS Edinburgh, Scotland
Friendly giant meets pointlike instantons? On a new conjecture by John McKay
July 5-13, 2004,
Moonshine- the first quarter centry and beyond, ICMS Edinburgh, Scotland
The 'very attractive' relatives of the (2)
4
Gepner model
June 9, 2004,
9th meeting of the North British Mathematical Physics Seminar, York, UK
On degenerating sequences of CFTs and their geometric interpretation
May 20, 2004, Workshop on
Geometry and duality in string theory, Oberwolfach, Germany
On degeneration phenomena in geometry and conformal field theory
April 29 - May 3, 2004, lecture series presented at the ESI workshop Mathematical and physical aspects of branes in Calabi-Yau spaces, Vienna, Austria
From geometry to CFT and back to geometry
March 18, 2004, Theoretical Particle Physics Seminar, DIAS Dublin, Ireland
On conformal field theories associated to "very attractive'' K3 surfaces
November 3, 2003, Geometry/topology seminar, Glasgow, Scotland
Orbifold constructions of K3
Geometric interpretations of conformal field theories associated to K3
September 17 and 18, 2003, Math-Physics Joint Seminar, University of Pennsylvania, Philadelphia, USA
The many routes to K3
September 16, 2003, Math/Physics Colloquium, University of Pennsylvania, Philadelphia, USA
Decoding the geometry of conformal field theories
September 11, 2003, Mathematics Colloquium, UNC Chapel Hill, USA
September 8, 2003, Physics Colloquium, UNC Chapel Hill, USA
Conformal field theory and geometry of strings: Some introductory remarks
Conformal field theories and their geometric interpretations
June 16 and 19, 2003, Dipartimento di Fisica, Università di Pisa, Italy
Conformal field theory on K3: The Fermat quartic
May 14, 2003, Geometry Seminar, Bath, UK
Geometric interpretation of conformal field theories: A (degenerate) example
May 1, 2003, Geometry Seminar, University of Edinburgh, Scotland
CFT on K3 and an application of Shioda-Inose structures
March 9-21, 2003,
Frontiers in Number Theory, Physics and
Geometry, École de physique des Houches, Les Houches, France
Ascent to K3 by CFT
November 22-25, 2002,
London Mathematical Society Regional Meeting - Wales 2002, Gregynog, Wales
Conformal field theory on K3: A status report
November 18, 2002, String theory seminar, Mathematical Institute, Oxford, UK
Aspects of mirror symmetry on K3
June 24-28, 2002, EuroConference on
Higher dimensional complex geometry, Cambridge, UK
A hiker's view of K3: Geometric aspects of conformal field theory
June 10, 2002, Isaac Newton Institute Seminar, Cambridge, UK
Orbifold constructions of K3: SCFT vs. geometry
May 24, 2002,
The Third ABC-KLM Network Meeting, Cambridge, UK
Geometric aspects of CFT on K3
April 8-12, 2002, Workshop on String Theory and Complex Geometry, Bad Honnef, Germany
Strings on low-dimensional Calabi-Yau manifolds: A geometric approach
Strings on K3: Orbifold constructions
March 19 and April 19, 2002, series of talks presented at the "Algebraic Geometry" and "Physically inspired Mathematics" Seminars at the Department of Mathematics, UNC Chapel Hill, USA
Geometry and conformal field theory for orbifold limits of K3
February 13 and 14, 2002, Theory group seminar at the Enrico Fermi Institute, University of Chicago, and BCDE Seminar at the University of Illinois at Urbana-Champaign, USA
January 24, 2002, Duke-UNC String Theory Seminar, UNC Chapel Hill, USA
Mirror symmetry on Kummer type K3 surfaces. An overview
November 15, 2001, Seminar on Topological Quantum Field Theory, MPI für Mathematik, Bonn, Germany
Aspects of mirror symmetry for orbifold limits of K3
November 7, 2001, Theoretical Physics Seminar at the Mathematics Department, King's College, London, UK
Aspects of N=(4,4) SCFT on K3, I and II: Mirror symmetry on Kummer type K3 surfaces
October 31 and November 1, 2001, Workshop on
Mathematical Aspects of String Theory, Erwin Schrödinger Institut, Vienna, Austria
Orbifold CFT on K3 and applications to mirror symmetry
July 20, 2001, AG Darstellungstheorie, Mathematics Institute, Freiburg i.Br., Germany
Geometric aspects of conformal field theory
July 16, 2001, Mathematisches Kolloquium für Analysis, Stuttgart, Germany
Mirror symmetry on Kummer type K3 surfaces
July 12, 2001, Special Seminar in the Maths Department, Durham, UK
Orbifold conformal field theories on K3
May 4-8, 2001, Workshop on "Mathematical Aspects of Orbifold String Theory", Madison, Wisconsin, USA
October 12, 2000, Duke-UNC String Theory Seminar, UNC Chapel Hill, USA
From the torus to K3: Orbifold conformal field theories
August 17, 2000, Seminar on Topological Quantum Field Theory, MPI für Mathematik, Bonn, Germany
Conformal field theory: Z
M
Orbifolds in the moduli space of conformal field theories with c=6
July 20, 2000, Oberseminar zur Algebra, Stuttgart, Germany
Moduli of CFT on K3. II: Superconformal field theories
June 29, 2000, Seminar on Topological Quantum Field Theory, MPI für Mathematik, Bonn, Germany
(Crystallographic) orbifold conformal field theories
March 6, 2000, Specialist Mathematical Physics Monday's Seminar, York, UK
Z
2
Orbifolds in the moduli space of N=(4,4) superconformal field theories with central charge c=6
March 3, 2000, Friday Lunchtime Seminar in the Maths Department, Durham, UK
A Hiker's guide to K3 - Aspects of N=(4,4) superconformal field theory with central charge c=6
January 7-11, 2000, Workshop on "Recent developments in string theories, conformal field theories and integrable models from the previous millennium", Tel Aviv, Israel
Aspects of conformal field theory on K3
April 18-24, 1999, Conference on
Mathematical Aspects of String Theory
, Oberwolfach, Germany
Kritische Metriken bzgl. analytischer Ray-Singer Torsion und Quillenmetrik
February 13, 1997, Forschungsseminar "Geometrische Analysis und Spektraltheorie'', HU Berlin, Germany
Regularized determinants of Laplacians and Ray-Singer analytic torsion
October 9-11, 1996, Conference on "Analysis, Numerics and Applications of Differential and Integral Equations", Stuttgart, Germany