Event time: 
Tuesday, November 19, 2019 - 5:00pm
LOM 206
Shiyue Li
Speaker affiliation: 
Brown University
Event description: 
Abstract: A matroid is a combinatorial object generalizing the idea of “linear independence” of a set in vector spaces.  One example of a matroid is the edge set of a finite graph together with all forests in the graph. Such matroids can be used to prove the correctness of various greedy algorithms for finding spanning trees of a finite graph. Besides this instance of matroids, I want to share with you some invariants of general matroids and their incarnations in geometry that connect combinatorics, graph theory and algebra.