2 papers
math.GR2009
On Kostant's partial order on hyperbolic elements
Huajun Huang, Sangjib Kim
We study Kostant's partial order on the elements of a semisimple Lie group in relations with the finite dimensional representations. In particular, we prove the converse statement…
math.AG2007
Some Extensions of Witt's Theorem
Huajun Huang
We extend Witt's theorem to several kinds of simultaneous isometries of subspaces. We determine sufficient and necessary conditions for the extension of an isometry of subspaces $ϕ…