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SEMINAR: Groups and Combinatorics Seminar: Counting labelled delta-matroids

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Today's date is Monday, January 25, 2021
Groups and Combinatorics Seminar: Counting labelled delta-matroids Other events...
Time and place: 11:00 Friday 1 April in MLR1

Speaker: Steven Noble (Brunel University London)

Title: Counting labelled delta-matroids

Abstract: Delta-matroids were introduced and studied by Bouchet in the 1980s, but have largely been ignored until the last few years. They generalize matroids and include classes coming from embedded graphs and from symmetric matrices. This talk is based on recent joint work with Darryl Funk and Dillon Mayhew, in which we give bounds on the number of labelled delta-matroids with n elements. As expected there are many more delta-matroids than matroids, but the number of even delta-matroids, a class that is generally thought to behave more like matroids, is not so much larger than the number of matroids.
Contact Tomasz Popiel <[email protected]>
Start Fri, 01 Apr 2016 11:00
End Fri, 01 Apr 2016 12:00
Submitted by Tomasz Popiel <[email protected]>
Last Updated Wed, 30 Mar 2016 16:47
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