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Lie Groups and Representation Theory

Seminar information archive ~06/25Next seminarFuture seminars 06/26~

Date, time & place Tuesday 16:30 - 18:00 126Room #126 (Graduate School of Math. Sci. Bldg.)

2012/11/20

16:30-17:30   Room #126 (Graduate School of Math. Sci. Bldg.)
Ali Baklouti (Sfax University)
On the geometry of discontinuous subgroups acting on some homogeneous spaces (ENGLISH)
[ Abstract ]
Let G be a Lie group, H a closed subgroup of G and \\GammaadiscontinuoussubgroupforthehomogeneousspaceG/H.Ifirstintroducethedeformationspace{\\mathcal{T}}^{K_o}(\\Gamma, G, H)oftheactionof\\GammaonG/HinthesenseofKobayashiandsomeofitsrefinedversions,namelytheCliffordKleinspaceofdeformationsoftheform{\\mathcal{X}}=\\Gamma \\backslash G/H.Thedeformationspace{\\mathcal{T}}^{G_o}(\\Gamma, G,H)ofmarked(G,H)structureson{\\mathcal{X}}inthesenseofGoldmanisalsointroduced.Asanimportantmotivation,Iwillexplaintheconnectionbetweenthespaces{\\mathcal{T}}^{K_o}(\\Gamma, G, H)and{\\mathcal{T}}^{G_o}(\\Gamma, G, H)$ and study some of their topological features, namely the rigidity in the sense of Selberg--Weil--Kobayashi and the stability in the sense of Kobayashi--Nasrin. The latter appears to be of major interest to write down the connection explicitly.