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K. Attractivité-de, compact stable relativement à M* d'après [3, corollaire 1.5.26] il est positivement invariant

. Maintenant, soit z e Â-(x); puisque ^-(*) est un compact invariant

K. Stabilité-de, On va démontrer que D+ (K) : K ce qui implique

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. Maintenant, du tait que À-(y) est un compact invariant, on a Â+(z) c A-(V), soit Â+(z) A K :0, ce qui contredit le fait que K est attractif

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