On affine extension of splint root systems
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- Lyakhovsky, V.D. & Nazarov, A.A. Phys. Part. Nuclei (2012) 43: 676. doi:10.1134/S106377961205022X
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Splint of root system of simple Lie algebra appears naturally in the study of (regular) embeddings of reductive subalgebras. It can be used to derive branching rules. Application of splint properties drastically simplifies calculations of branching coefficients. We study affine extension of splint root system of simple Lie algebra and obtain relations on theta and branching functions.