Events Mini Calendar

Go to previous month Go to next month
  S M T W R F S
W9 28 1 2 3 4 5 6
W10 7 8 9 10 11 12 13
W11 14 15 16 17 18 19 20
W12 21 22 23 24 25 26 27
W13 28 29 30 31 1 2 3


Today is:
Fri, Dec 13, 2024


MSU Events Calendar

 
 Choose Calendar view:   Day   Week   Month     Search   Filter

3:00pm
to
3:50pm
Math Seminar Series  (Conferences / Seminars / Lectures)

Combinatorics and Graph Theory

Stephanie van Willigenburg, University of British Columbia, will be speaking.

The title is "The e-positivity of chromatic symmetric functions."

Contact Bruce E Sagan (bsagan@msu.edu) for more information.

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.

more information...


Location: Online via Zoom [map]
Price: free
Sponsor: Department of Mathematics
Contact: Department of Mathematics
phone pic (517) 353-0844