Algebraic Combinatorics Seminar
UNIVERSITY OF KENTUCKY
ALGEBRAIC COMBINATORICS SEMINAR
845 PATTERSON OFFICE TOWER
Total Positivity of Matrices: Two Combinatorial Approaches
Monday, March 22, 2004
11:00 am, 945 Patterson Office Tower
NOTE TIME AND PLACE!!
A matrix is totally positive if the determinant of any square
submatrix is positive. I will present and elucidate two methods used
in a paper by Fomin and Zelevinsky to characterize and develop a test
for totally positive square matrices. Planar networks are graphs with
n sources and n sinks with a particular form that will be presented.
Double-wiring diagrams will be explained and used as well.