Sara C. Billey

activity

20002008

most citedA vector partition function for the multiplicities of sl_k(C)

13 citations · 20 across the 3 of their papers we have counts for

collaborators

Showing 2002Show all

2 papers · 1 filter

math.CO2002

Smoothness of Schubert varieties via patterns in root systems

Sara Billey, Alexander Postnikov

The aim of this article is to present a smoothness criterion for Schubert varieties in generalized flag manifolds $G / B$ in terms of patterns in root systems. We generalize Lakshmib…

math.RT2002

Lower bounds for Kazhdan-Lusztig polynomials from patterns

Sara Billey, Tom Braden

We give a lower bound for the value at q=1 of a Kazhdan-Lustig polynomial in a Weyl group W in terms of "patterns''. This is expressed by a "pattern map" from W to W' for any parab…