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16 p, 103.4 KB Contraction groups in complete Kac-Moody groups / Baumgartner, Udo ; Ramagge, Jacqui ; Rémy, Bertrand ; Centre de Recerca Matemàtica
Let G be an abstract Kac-Moody group over a finite field and G the closure of the image of G in the automorphism group of its positive building. We show that if the Dynkin diagram associated to G is irreducible and neither of spherical nor of affine type, then the contraction groups of elements in G which are not topologically periodic are not closed. [...]
Centre de Recerca Matemàtica 2007 (Prepublicacions del Centre de Recerca Matemàtica ; 752)  

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