Maximal closed subroot systems of real affine root systems
classification
🧮 math.RA
math.CO
keywords
systemsaffinerootclosedmaximalrealsubrootalgebras
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We completely classify and give explicit descriptions of the maximal closed subroot systems of real affine root systems. As an application we describe a procedure to get the classification of all regular subalgebras of affine Kac Moody algebras in terms of their root systems.
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