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                * Princeton Discrete Math Seminar *
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Speaker: Eli Berger, University of Haifa

Thursday 17th September, 3:00 in Fine Hall 224.

Title: Infinite matroids on the poset of rationals and the infinite
	Edmonds' intersection problem

This talk describes a class of matroids on the ground set of rational 
numbers with some interesting properties. For example: Each base
has finitely many fundamental sets forming a chain under inclusion.
Every set S has a closure of the form S \cup D \cup F, where D is a
Dedekind cut and F is finite.

In the talk, I will show how to construct such a matroid assuming
2^{\aleph_0} = \aleph_1, and discuss why this class of matroids could
help address the infinite version of Edmonds' matroid intersection
theorem. 
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