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DTSTAMP:20210317T200000Z
UID:1615900884781@events.msu.edu
CATEGORIES:Conferences / Seminars / Lectures
DTSTART:20210317T200000Z
DTEND:20210317T205000Z
SUMMARY:Math Seminar Series
DESCRIPTION:
Combinatorics and Graph Theory\n
\n
Stephanie van
Willigenburg, University of British Columbia,
will be speaking.\n
\n
The title is "The e-positivity
of chromatic symmetric functions."\n
\n
Contact
Bruce E Sagan (bsagan@msu.edu) for
more information.\n
\n
The chromatic polynomial
was generalized to the chromatic symmetric
function by Stanley in his seminal 1995 paper.
This function is currently experiencing a flourishing
renaissance, in particular the study
of the positivity of chromatic symmetric functions
when expanded into the basis of elementary
symmetric functions, that is, e-positivity.
In this talk we approach the question of
e-positivity from various angles. Most pertinently
we resolve the 1995 statement of Stanley
that no known graph exists that is not contractible
to the claw, and whose chromatic symmetric
function is not e-positive. This is
joint work with Soojin Cho, Samantha Dahlberg,
Angele Foley and Adrian She, and no prior knowledge
is assumed.\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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