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Theory of connexes. II - MaRDI portal

Theory of connexes. II (Q1068740)

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scientific article; zbMATH DE number 3930772
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Theory of connexes. II
scientific article; zbMATH DE number 3930772

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    Theory of connexes. II (English)
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    1985
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    [For part I see ibid. 17, 777-812 (1981; Zbl 0476.90100).] - Considered is the famous game named Hex, where two players occupy the vertices in a rhombus and who obtains a path between his initially posed pieces wins. It is remarkable that this game always gives a single winner. Regarding the board as the upper half of the sphere, we notice the following statement: ''Suppose there is a simplicial decomposition of the sphere invariant by the antipodal mapping. If two players occupy all the dipoles of vertices, then there exists strictly one player who obtains in his territory a connected set of vertices invariant under the antipodal action.'' Our purpose in this paper is to prove the above statement in a more general situation.
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    Hex
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