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Twisted root system of a (*)-subgroup (1805.06330v2)
Published 16 May 2018 in math.GR and math.RT
Abstract: We classify ()-subgroups of compact Lie groups of adjoint type, and associate a twisted root system to every ()-subgroup. We study the structure of twisted root system in several aspects: properties of the small Weyl group W_{small} and its normal subgroups W_{tiny} and W_{f}; properties of finite root datum; structure of strips of infinite roots.
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