Abstract
In this paper we classify the subsemigroups of any connected semisimple Lie groupG which areK-bi-invariant, whereG=KAN is an Iwasawa decomposition ofG.
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Kelly-Lyth, D., McCrudden, M. On subsemigroups of semisimple Lie groups. Proc. Indian Acad. Sci. (Math. Sci.) 105, 153–156 (1995). https://doi.org/10.1007/BF02880361
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DOI: https://doi.org/10.1007/BF02880361