# Module MA1111: Linear Algebra I

**Credit weighting (ECTS)**- 5 credits
**Semester/term taught**- Michaelmas term 2014-15
**Contact Hours**- 11 weeks, 3 lectures including tutorials per week
**Lecturer**- Prof Vladimir Dotsenko
**Learning Outcomes**- On successful completion of this module, students will be able to:
- operate with vectors in dimensions 2 and 3, and apply vectors to solve basic geometric problems;
- apply various standard methods (Gauss-Jordan elimination, inverse matrices, Cramer's rule) to solve systems of simultaneous linear equations;
- compute the sign of a given permutation, and apply theorems from the module to compute determinants of square matrices;
- demonstrate that a system of vectors forms a basis of the given vector space, compute coordinates of given vectors relative to the given basis, and calculate the matrix of a linear operator relative to the given bases;
- give examples of sets where some of the defining properties of vectors, matrices, vector spaces, subspaces, and linear operators fail;
- identify the above linear algebra problems in various settings (e.g. in the case of the vector space of polynomials, or the vector space of matrices of given size), and apply methods of the module to solve those problems.

**Module Content**-
We will cover the following topics, yet not necessarily in the order listed.

- Lines, planes and vectors, dot and cross product.
- Linear systems, Gauss-Jordan elimination, reduced row echelon form.
- Matrix multiplication, elementary row operations, inverse matrix.
- Permutations, odd and even, determinants, transpose matrix.
- Minors, cofactors, adjoint matrix, inverse matrix, Cramer's rule.
- Vector spaces, linear independence and span, bases and dimension.
- Linear operators, matrix of a linear operator with respect to a basis.
- Change of basis, transition matrix, conjugate matrices.

**Textbook**We will not follow any particular textbook. Two typical references are-
*Algebra*by Michael Artin, -
*Basic linear algebra*by Blyth and Robertson.

Notes, homework assignments and solutions will be posted on the web page http://www.maths.tcd.ie/~vdots/teaching/MA1111+1212-1415.html

**Module Prerequisite**- None for students admitted to the Mathematics, Theoretical Physics or Two-subject Moderatorships.
**Assessment Detail**- This module will be examined in a 2 hour
**examination**in Trinity term. Homework assignments will be due every Thursday. 20% homework, 80% final exam (based on homework and tutorials). Supplemental exams will consist of 100% exam.