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Title: The e-positivity of chromatic symmetric functions

Speaker: Steph van Willigenburg Affiliation: University of British Columbia Zoom: Contact Karen Yeats

Abstract:

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.