Edward Richmond

activity

20072026

most citedBilley-Postnikov decompositions and the fibre bundle structure of Schubert varieties

18 citations · 71 across the 15 of their papers we have counts for

collaborators

Showing 2026Show all

2 papers · 1 filter

math.CO2026

Staircase diagrams, pattern avoidance, and smooth permutations

Faqruddin Ali Azam, Edward Richmond

A well known result due to Lakshmibai and Sandhya states that smooth Schubert varieties of type A correspond to permutations that avoid the patterns 3412 and 4231. It was later sho…

math.CO2026

Shifted lower Bruhat intervals are EL-shellable

Aman Dave, Taiwen Feng, Nathan Lesnevich +4

Let $W$ be an arbitrary Coxeter group. The shifted Bruhat interval $[w_{1}, w_{2}] x^{- 1}$ , the translate of the Bruhat interval $[w_{1}, w_{2}]$ by an element $x$ , is partially ordered by…