$\mathbf{\pi }$-systems of symmetrizable Kac-Moody algebras

Lisa Carbone, K. N. Raghavan, Biswajit Ransingh +2

As part of his classification of regular semisimple subalgebras of semisimple Lie algebras, Dynkin introduced the notion of a $\pi$-system. This is a subset of the roots such that pa…