
Exact formulas for root space multiplicities in Cartan matrix Lie algebras and their universal enveloping algebras are computed. We go on to determine the number of free generators of each degree of the radicals defining these algebras.
root space multiplicities, Kac-Moody Lie algebra, Infinite-dimensional Lie (super)algebras, universal enveloping algebras, Cartan matrix Lie algebras
root space multiplicities, Kac-Moody Lie algebra, Infinite-dimensional Lie (super)algebras, universal enveloping algebras, Cartan matrix Lie algebras
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