Workshop

Matrices and Group Representations

(on the occasion of G. N. de Oliveira's 60th birthday)

Department of Mathematics - University of Coimbra

Wednesday, 6 May 1998

10.30 - 11.00: Opening session

11.00 - 12.00: James A.Green (Oxford), Some formulae for GL(n,q)

12.10 - 12.40: António J. Machiavelo (Porto), Galois Representations and Hilbert's Theorem 90

14.30 - 15.00: Natália Bebiano (Coimbra), PSD-matrices in statistical mechanics

15.10 - 15.40: Orlando Neto (Lisboa), On the rigidity problem for sums and products of matrices

16.10 - 16.40: Helena Albuquerque (Coimbra), Cayley Algebras as quasi-algebras

16.50 - 17.50: J. A. Dias da Silva (Lisboa), The rank partition in Multilinear Algebra

Thursday, 7 May 1998

9.30 - 10.30: Gordon James (London), Symmetric groups and related algebras

10.40 - 11.10: Carlos André (Lisboa), Irreducible characters of finite algebra groups

11.40 - 12.10: Olga Azenhas (Coimbra), Littlewood-Richardson triples and their symmetries

12.20 - 12.50: Antónia Duffner (Lisboa), On extremal $\chi$-convertible subspaces

14.30 - 15.00: Alexander Kovacec (Coimbra), The role of representation theory in the Oliveira conjecture

15.10 - 15.40: A. Leal Duarte (Coimbra), Inverse eigenvalue problems for acyclic matrices

16.10 - 17.10: Matjaz Omladic (Ljubljana), Matrix groups generated by involutions

Friday, 8 May 1998

9.30 - 10.30: Thomas J.Laffey (Dublin), Some conjectures on the spectra of nonnegative matrices

10.40 - 11.10: M. Graça Marques (Faro), The seven problems

11.40 - 12.10: M. Emília Miranda (Coimbra), Oliveira's L-transformation

12.20 - 12.50: Fernando C. Silva (Lisboa), Minimax and interlacing theorems in modular lattices

14.30 - 15.30: Ion Zaballa (Bilbao), Invariant Subspaces and Matrix Completions

*

Organizers:
A. Leal Duarte (leal@mat.uc.pt)
J. F. Queiró (jfqueiro@mat.uc.pt)
A. P. Santana (aps@mat.uc.pt)
Fernando C. Silva (fcsilva@hermite.cii.fc.ul.pt)

Support:
Centro de Matemática da Universidade de Coimbra
Centro de Álgebra da Universidade de Lisboa
Projecto Praxis 2/2.1/MAT/458/94

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