Johan Kaahrstrom

most citedKostant's problem and parabolic subgroups

1 citations · 1 across the 3 of their papers we have counts for

collaborators

3 papers

math.RT2008★ 1 cited

Kostant's problem and parabolic subgroups

Johan Kåhrström

Let $g$ be a finite dimensional complex semi-simple Lie algebra with Weyl group $W$ and simple reflections $S$ . For $I \subseteq S$ let $g_{I}$ be the corresponding semi-s…

math.RT2007

Tensoring with infinite-dimensional modules in $\scr O_0$

Johan Kåhrström

We show that the principal block $\scr O_0$ of the BGG category $\scr O$ for a semisimple Lie algebra $\germ g$ acts faithfully on itself via exact endofunctors which preserve tilt…

math.RT2007

Bilinear forms on $sl_{2}$ -modules and a hypergeometric identity

Johan Kåhrström

In this paper we study properties of a certain bilinear form on finite dimensional $sl_{2} (R)$ -modules, and how these properties behave with respect to tensor pro…

Kostant's problem and parabolic subgroups

Tensoring with infinite-dimensional modules in $\scr O_0$

Bilinear forms on sl2​-modules and a hypergeometric identity

Bilinear forms on $sl_{2}$ -modules and a hypergeometric identity