Irish Mathematical Society

Cumann Matamaitice na hÉireann

BULLETIN Number 39 December 1997

ISSN 0791-5578

Contents

• IMS Officers and Local Represenattives ......... ii
• Notes on Applying for IMS Nenbership ......... iii
• Minutes of IMS meeting 21.3.1997 ..................... 1
• Mathskills announcement .........Ken Houston .. 4

  ---

• Articles
• Congruence of Quaternionic Skew-Hermitian
  Matrices .......David Lewis ... 6
• Perturbation of Linear Operators by
  Idempotents ..... Mícheál Ó Searcóid ... 10
• Describing Ideals of Endomorphism Rings
  .... Brendan Goldsmith
  .... Simone Pabst .................................. 14

  ---

• Historical Article

  George Salmon 1819 - 1904:
  His Mathematical Work and Influence
  .... Rod Gow .......................................... 26