 
Summary: Mathematics
and
Statistics
GRADUATE SEMINAR
Fatemeh Alinaghipour
Zero forcing parameters for graphs
PhD Student supervised by S. Fallat and K. Meagher
Monday November 7th
14:30
Math & Stats Lounge (CW 307.20)
Abstract: The interaction between linear algebra, graph theory, and combina
torics has developed into a substantial discipline, known as "combinatorial matrix
theory". Pattern classes of matrices represent an important part of this discipline.
A graph or digraph describes the zerononzero pattern of a family of matrices.
A minimum rank problem is to determine the minimum among the ranks of
the matrices in one of these families. Considerable progress has been made on
the minimum rank problem for the family of symmetric matrices described by a
simple graph (free diagonal), although the problem is far from solved. In this pre
sentation, we will give a brief introduction on the graph parameters zero forcing
number and positive semidefinite zero forcing number which are powerful tools
