Order of dynamical and control systems on maximal compact subgroups

TL;DR

This paper introduces an algebraic order called the extended Bruhat order on maximal compact subgroups of semisimple Lie groups, linking dynamical systems and algebraic structures through geometric and combinatorial methods.

Contribution

It characterizes the dynamical orders of minimal Morse components and control sets using the extended Bruhat order, extending classical Bruhat order concepts to new geometric contexts.

Findings

Defines the extended Bruhat order on maximal compact subgroups.

Shows the order projects onto the classical Bruhat order.

Connects dynamical systems with algebraic and geometric structures.

Abstract

In this paper, we characterize the dynamical orders of minimal Morse components and, partially, of control sets on maximal compact subgroups of a semisimple Lie group as an algebraic order similar to the Bruhat order of the Weyl group. We call this order the extended Bruhat order of the extended Weyl group (or Weyl-Tits group), since it projects onto the Bruhat order and is obtained in an analogous way as the Bruhat order was historically obtained, as the incidence order of the Schubert cells in the maximal flag manifold, but now the Schubert cells in the maximal extended flag manifold.