3 papers
math.CO2018
Chain Posets
Ian T. Johnson
A chain poset, by definition, consists of chains of ordered elements in a poset. We study the chain posets associated to two posets: the Boolean algebra and the poset of isotropic…
math.RT2017
Spin nilHecke algebras of classical type
Ian Johnson, Weiqiang Wang
We formulate and study the spin nilHecke algebras and of type B/D, which differ from the usual nilHecke al…
math.AT2005
On the degree 2 map for a sphere
F. R. Cohen, I. Johnson
The purpose of this article is to compare the two self-maps of given by the -fold looping of a degree 2 map and the H-space squaring map. The mai…