Monday, July 19

 

Mathematics Department

 

15.00 - 16.40: Parallel Sessions

Mini-Symposium on Group Representations , organized by Ana Paula Santana and Carlos André (Part 1) - Room Pedro Nunes
15.00 - 15.20: Jamshid Moori (KwaZulu-Natal University)

Clifford-Fischer matrices

15.20 - 15.40: Olga Azenhas (Coimbra University)

The fundamental symmetry of Littlewood-Richardson coefficients

15.40 - 16.00: S. V. Savchenko (RAS, Moscow)

Cayley digraphs, group representations and Jordan blocks

16.00 - 16.20: Carlos André (Lisbon University)

Supercharacters of finite unipotent groups

 

Mini-Symposium on Matrix Inequalities , organized by Chi-Kwong Li (Part 1) - Room 17 de Abril
15.00 - 15.20: Tsuyoshi Ando (Hokkaido University)

Norms related to numerical radius

15.20 - 15.40: Natália Bebiano (Coimbra University)

Inequalities for J-Hermitian matrices

15.40 - 16.00: George Styan (McGill University)

Inequalities and equalities for the generalized efficiency function in orthogonally partitioned linear models

16.00 - 16.20: Roy Mathias (College of William and Mary)

Geometric means and powers of positive definite matrices

16.20 - 16.40: Chi-Kwong Li (College of William and Mary)

Inequalities on eigenvalues and singular values of block matrices

 

Contributed Talks, Session 1 - Room 2.3

15.00 - 15.20: M. Celeste Gouveia

                      Drazin invertibility of Hankel matrices

15.20 - 15.40: Nestor Thome

                      A note on Schur complement

15.40 - 16.00: Pedro Patrício

                      Roth's equivalence theorem over rings

16.00 - 16.20: Oskar Maria Baksalary

                      On linear combinations of hypergeneralized projectors

16.20 - 16.40: Martha Takane

Cones with modular face lattice of height 3

 

Contributed Talks, Session 2 - Room 2.5

15.00 - 15.20: Harm Bart

                      Vector-valued logarithmic residues and integer combinations of idempotents

15.20 - 15.40: Masahiro Yanagida

                      Relations among operator inequalities and their applications to non-normal operators

15.40 - 16.00: Jorge Buescu

                      Positive definite matrices and reproducing kernel inequalities

16.00 - 16.20: Seung-Hyeok Kye

                      A family of entangled states with positive partial transpose arising from indecomposable positive linear maps

16.20 - 16.40: Yadollah Nejad Dehghan

                      Numerical range and spectrum of paranormal operators

 

Contributed Talks, Session 3 - Room 2.4

15.00 - 15.20: Carmen Coll

                      Some results on symmetric systems

15.20 - 15.40: Paula Rocha

                      On the restriction of solutions of linear PDEs: a polynomial module approach

15.40 - 16.00: Begoña Cantó

                      An N-periodic discrete-time linear system with delays

16.00 - 16.20: Agurtzane Amparan

                      On the existence of linear systems with prescribed invariants for system similarity

16.20 - 16.40: Silvia Marcaida

                      Perturbation of controllable matrix pairs: infinite structure

 

 

 

Tuesday, July 20

 

Mathematics Department

 

14.00 - 16.00: Parallel Sessions

Mini-Symposium on Combinatorial Matrix Theory , organized by Bryan Shader - Room Pedro Nunes
14.00 - 14.30: José Dias da Silva (Lisbon University)

Weak Sidon sets, linear algebra and matroid theory

14.30 - 15.00: Richard Brualdi (University of Wisconsin Madison)

Oriented graphs, tournaments, matrices, and local hierarchy theory

15.00 - 15.30: Alan Hoffman (Watson Research Center)

On combinatorial optimization and convexity in toag-space

15.30 - 16.00: Bryan Shader (University of Wyoming Laramie)

Packings by Hessenberg permutation matrices

 

Contributed Talks, Session 4 - Room 2.3

14.00 - 14.20: Helena Albuquerque

                      Quasi-LU decomposition

14.20 - 14.40: Rosa María Navarro

                      Heisenberg superalgebras

14.40 - 15.00: Pedro J. Freitas

                      Compactifications of positive matrices

15.00 - 15.20: Ricardo Mamede

                      Matrix realizations of pairs of Young tableaux

15.20 - 15.40: Eugénio Rocha

A transition relation between some noncommutative symmetric functions

15.40 - 16.00: Alexander Guterman

                      Matrix polynomials over non-negative integers and their linear preservers

 

Contributed Talks, Session 5 - Room 2.5

14.00 - 14.20: Takayuki Furuta

                      Convergences of some logarithmic trace inequalities

14.20 - 14.40: Eizaburo Kamei

                      Difference between chaotic order and usual order in Furuta type inequalities via operator mean

14.40 - 15.00: Shigeru Furuichi

                      On matrix inequalities in quantum information theory

15.00 - 15.20: Hristo Sendov

                      Generalized Hadamard product and the derivatives of spectral functions

15.20 - 15.40: Juan-Miguel Gracia

                      Multiplicities of the pseudoeigenvalues

15.40 - 16.00: Panayiotis Psarrakos

                      On the pseudospectra of matrix polynomials

 

Contributed Talks, Session 6 - Room 17 de Abril

14.00 - 14.20: Vadim Olshevsky

                      A generalization of the Kharitonov theorem for entire functions

14.20 - 14.40: Filomena Dias d'Almeida

                      Spectral refinement for clustered eigenvalues of quasi-diagonal matrices

14.40 - 15.00: Chun-Hua Guo

                      On hyperbolic quadratic eigenvalue problems

15.00 - 15.20: Carmen Perea

                      Positive cones and convergence conditions for iterative methods based on splittings

15.20 - 15.40: Tom Bella

                     Equivalence of Hadamard and pseudo-noise matrices

 

Contributed Talks, Session 7 - Room 2.4

14.00 - 14.20: Pál Rózsa

                      Pseudo-circulant matrices and their applications

14.20 - 14.40: Shaun Fallat

                      A new look at totally positive matrices

14.40 - 15.00: Luis Verde-Star

                      Generating functions of some structured matrices

15.00 - 15.20: Vladimir Kostic

                      Some new caracterizations of H-matrices

15.20 - 15.40: Uriel G. Rothblum

                      Expanding multiplicative systems and lower bounds on minimal growth rates

15.40 - 16.00: Ryan Hutchinson

                      Superregular matrices and their importance in convolutional coding theory

 

 

 

Wednesday, July 21

 

Mathematics Department

 

14.00 - 16.00: Parallel Sessions

Mini-Symposium on Markov Methods for Search Engines , organized by Ilse Ipsen and Steve Kirkland - Room Pedro Nunes
14.00 - 14.30: Steve Kirkland (University of Regina)

Convergence analysis of an improved PageRank algorithm

14.30 - 15.00: Daniel Szyld (Temple University, Philadelphia)

Numerical solution of Markov chains: Schwarz (overlap) and asynchronous parallelism

15.00 - 15.30: Michael Neumann (University of Connecticut Storrs)

Proximity in group inverses of M-matrices and inverses of diagonally dominant M-matrices and applications

15.30 - 16.00: Ivo Marek (Czech Technical University)

Computing the characteristics of Markov chains

 

Contributed Talks, Session 8 - Room 2.3

14.00 - 14.20: Maria Manuel Torres

                      Orthogonality of decomposable symmetrized tensors and edge colorings for bipartite graphs

14.20 - 14.40: Ilda Silva

                      Recursivity and geometry of the hypercube

14.40 - 15.00: Rosário Fernandes

                      On the powers of a vectorial matroid an equivalence relation

15.00 - 15.20: Henrique Cruz

                      Immanantal decomposable tensors: the equality problem

15.20 - 15.40: Fátima Rodrigues

                      Plücker polynomials for tensor spaces

15.40 - 16.00: Mohammad Shahryari

                      On the equality of generalized matrix functions

 

Contributed Talks, Session 9 - Room 2.5

14.00 - 14.20: Christian Mehl

                      Are normal matrices in indefinite inner products normal?

14.20 - 14.40: Takeaki Yamazaki

                      On the polar decomposition of the product of operators

14.40 - 15.00: Aissa Nasli Bakir

                      Unitary nodes and contractions in Hilbert spaces

15.00 - 15.20: Michael Karow

                      Real and complex operator norms of a real matrix

15.20 - 15.40: Augustyn Markiewicz

                      Some properties of radial sets of induced matrix norms

15.40 - 16.00: Abbas Salemi

                      On polynomial numerical hull of order 3

 

Contributed Talks, Session 10 - Room 2.4

14.00 - 14.20: M. Isabel Garcia-Planas

                      Similarity of pairs of linear maps defined modulo a subspace

14.20 - 14.40: Josep Clotet

                      Controllability of generalized second order linear systems

14.40 - 15.00: Raquel Pinto

                      A polynomial matrix approach to the analysis of structural properties in positive 2D systems

15.00 - 15.20: Miguel Carriegos

                      High order control systems over commutative rings

15.20 - 15.40: Héctor Diez Machío

                      Pencils of Hermitian matrices for single input quantum control systems

15.40 - 16.00: Andres Saez-Schwedt

                      Controllable systems over GCU rings and feedback cyclization

 

Contributed Talks, Session 11 - Room 17 de Abril

14.00 - 14.20: Raphael Loewy

                      On the eigenvalues of greatest common divisor matrices

14.20 - 14.40: Mehdi Radjabalipour

                      Transitivity versus irreducibility in left algebras of quaternionic matrices

14.40 - 15.00: Leo Livshits

                      Matrix semigroups with multiplicative diagonals

15.00 - 15.20: Nung-Sing Sze

                      Automorphisms of certain semigroups of matrices

15.20 - 15.40: Ajda Fosner

                      Automorphisms of the poset of upper triangular idempotent matrices

15.40 - 16.00: Maja Fosner

                      On Jordan ideals

 

16.00 - 16.30: Break

 

16.30 - 18.00: Parallel Sessions

Mini-Symposium on Group Representations , organized by Ana Paula Santana and Carlos André (Part 2) - Room Pedro Nunes
16.30 - 17.15: Persi Diaconis (Stanford University)

Fastest mixing Markov chains

17.15 18.00: Gerhard Hiss (RWTH, Aachen University)

Computational representation theory of finite groups

 

Contributed Talks, Session 12 - Room 2.3

16.30 - 16.50: Seok-Zun Song

                      Linear preservers of extremes of rank inequalities over semirings: row and column ranks

16.50 - 17.10: Gorazd Lesnjak

                      On injective Jordan semi-triple maps of Mn

17.10 - 17.30: Tatjana Petek

                      Mappings preserving unitary-similarity on B(H)

17.30 - 17.50: Victor Tan

                      On rank one preserver of symmetric matrix space

17.50 - 18.10: Bojan Kuzma

                      Additive spectrum compressors

 

Contributed Talks, Session 13 - Room 17 de Abril

16.30 - 16.50: Ljiljana Cvetkovic

                      Between Gersgorin and minimal Gersgorin sets

16.50 - 17.10: Frank Uhlig

                      Elevation matrices of surfaces

17.10 - 17.30: Rui Ralha

                      Orthogonalization procedures for scaled matrices

17.30 - 17.50: Man-Chung Yeung

                      Probabilistic analysis of complex gaussian elimination without pivoting

17.50 - 18.10: Andre Klein

                      On the resultant property of the Fisher information matrix of a vector ARMA process

 

Contributed Talks, Session 14 - Room 2.4

16.30 - 16.50: Jochen Trumpf

                      A Bruhat type decomposition of the set of conditioned invariant subspaces

16.50 - 17.10: Marta Peña

                      Versal deformations of pairs of endomorphism and invariant subspace

17.10 - 17.30: María Asunción Beitia

                      The change of the invariant factors under row perturbations. Controllable case

17.30 - 17.50: Inmaculada de Hoyos

                      The change of the invariant factors under row perturbations. General case

17.50 - 18.10: Izchak Lewkowicz

On the structure of convex invertible sets of real 2x2 matrices

 

Contributed Talks, Session 15 - Room 2.5

16.30 - 16.50: Dale Olesky

                      Rectangular submatrices of inverse M-matrices and the decomposition of a positive matrix as a sum

16.50 - 17.10: Rafael Cantó

                      On the minimum rank for zero-nonzero patterns

17.10 - 17.30: Cecília Perdigão

                      Graphs and minimal rank of matrices

17.30 - 17.50: Cláudia Mendes Araújo

                      The totally nonpositive matrix completion problem

17.50 - 18.10: Leslie Hogben

                      The positive and nonnegative P-matrix completion problems

 

 

 

Thursday, July 22

 

Mathematics Department

 

14.00 - 16.00: Parallel Sessions

Mini-Symposium on Nonnegative Matrices , organized by Thomas Laffey - Room Pedro Nunes
14.00 - 14.30: S.V. Savchenko (RAS, Moscow)

Principal submatrices of co-order one with the biggest Perron root

14.30 - 15.00: Bit-Shun Tam (Tamkang University)

A cone-theoretic proof for the preferred-basis theorem

15.00 - 15.30: Helena Smigoc (University of Ljubljana)

Inverse eigenvalue problem for nonnegative matrices

Mini-Symposium on Matrix Inequalities , organized by Chi-Kwong Li (Part 2)

15.30 - 15.50: Olga Holtz (University of California-Berkeley)

Functions that preserve nonnegativity of matrices

15.50 - 16.10: Man-Duen Choi (University of Toronto)

Positive linear maps on matrices

 

Contributed Talks, Session 16 - Room 2.3

14.00 - 14.20: Dario Bini

                      Solving an algebraic Riccati equation encountered in Markov chains

14.20 - 14.40: Adam Czornik

                      Bounds on the solution of discrete coupled algebraic Lyapunov equation

14.40 - 15.00: Malo Hautus

                      The matrix equation f(X)=A: robustness and local uniqueness

15.00 - 15.20: Marc Van Barel

Structures preserved by the QR algorithm

15.20 - 15.40: Edward Poon

                      Orthogonal decompositions of Euclidean space

15.40 - 16.00: Angel Garrido

                      Some connections between linear algebra and fuzzy logic

 

Contributed Talks, Session 17 - Room 17 de Abril

14.00 - 14.20: Cornelis Van der Mee

                      Circulant preconditioning of mono- and multi'index systems

14.20 - 14.40: Robert E. Hartwig

                      Focal Power

14.40 - 15.00: Petr Mayer

                      Computing Mean first passage times matrices by columns

15.00 - 15.20: João Cardoso

                      Gregory's series and Padé approximants for the logarithm of block triangular matrices

15.20 - 15.40: Ivana Pultarova

                      Treshold partitioning for iterative aggregation-disaggregation method

15.40 - 16.00: Knut Hueper

                      Numerical algorithms for output feedback pole assignment

 

Contributed Talks, Session 18 - Room 2.4

14.00 - 14.20: Roger Horn

                      A regularization algorithm for matrix congruences

14.20 - 14.40: Susana Furtado

                      Unitary similarity classes within the cospectral-congruence class of a matrix

14.40 - 15.00: Alicia Roca

                      On the Kronecker canonical form of pencils over arbitrary fields

15.00 - 15.20: Fernando Terán

                      Low rank perturbation of Weierstrass structure

15.20 - 15.40: Itziar Baragaña

                      Feedback invariants of pairs with prescribed restriction and an output injection problem

15.40 - 16.00: Marija Dodig

                      Feedback invariants of matrices with prescribed rows

 

Contributed Talks, Session 19 - Room 2.5

14.00 - 14.20: Jeffrey Stuart

                      Recent results on invertible ray pattern classes

14.20 - 14.40: James Weaver

                      (0,1) completely positive matrices associated with a search matrix

14.40 - 15.00: Maria da Graça Marques

                      Patterns of commutativity: the commutant of the full pattern

15.00 - 15.20: Frank Hall

                      From Boolean to sign pattern matrices

15.20 - 15.40: Americo Bento

                      A Fiedler's type characterization of band matrices

15.40 - 16.00: Filipe Santos

                      Jordan normal form and the graph of a triangular matrix