Combinatorial results on (1,2,1,2)-avoiding $GL(p,\mathbb{C})\times GL(q,\mathbb{C})$-orbit closures on $GL(p+q,\mathbb{C})/B$

Alexander Woo, Benjamin J. Wyser

Using recent results of the second author which explicitly identify the "$(1,2,1,2)$-avoiding" $GL(p,\mathbb{C})\times GL(q,\mathbb{C})$-orbit closures on the flag manifold $GL(p+…