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most citedA combinatorial approach to root multiplicities of rank 2 hyperbolic Kac-Moody algebras

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math.RT2018

Rigid reflections and Kac--Moody algebras

Kyu-Hwan Lee, Kyungyong Lee

Given any Coxeter group, we define rigid reflections and rigid roots using non-self-intersecting curves on a Riemann surface with labeled curves. When the Coxeter group arises from…