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DTSTAMP:20201111T200000Z
UID:1604933102383@events.msu.edu
CATEGORIES:Conferences / Seminars / Lectures
DTSTART:20201111T200000Z
DTEND:20201111T205000Z
SUMMARY:Math Seminar Series
DESCRIPTION:
Combinatorics and Graph Theory\n
\n
John Machacek
from Hampden-Sydney College will be speaking.\n
\n
The
title of the seminar is "Sign variation
and descents."\n
\n
This is a virtual meeting.\n
\n
Contact
Bruce E Sagan (bsagan@msu.edu)
for more information.\n
\n
We consider posets
of (projective) sign vectors ordered by reverse
inclusion of zero entries with restrictions
on sign variation. We show many of these posets
are partitionable and give an interpretation
of the h-vector in terms of descents in
signed permutations. This is joint work with
Nantel Bergeron and Aram Dermenjian. Time permitting
we will discuss conjectural (strong)
Spernicity.\n\n
Price: free\n
Sponsor: Department of Mathematics\n
Sponsor's Homepage: https://www.math.msu.edu/\n
Contact name: Department of Mathematics\n
Contact phone: (517) 353-0844\n
for more info visit the web at:\n
https://www.math.msu.edu/Seminars/CalendarView.aspx?month-of=September2016\n
LOCATION:Online via Zoom
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