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Groupes de réflexions et groupes de Coxeter - De l ... - DMA - Ens

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Condition <strong>de</strong> finitu<strong>de</strong><br />

Soient :<br />

D s <strong>et</strong> D t les droites supportant les miroirs ;<br />

θ l’angle entre les <strong>de</strong>ux miroirs ;<br />

Vivien Ripoll (ENS - <strong>DMA</strong>) <strong>Groupes</strong> <strong>de</strong> <strong>réflexions</strong> <strong>et</strong> <strong>groupes</strong> <strong>de</strong> Cox<strong>et</strong>er 11 mai 2009 5 / 16

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