EUDML | Modifications of closure collections

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Displaying similar documents to “Modifications of closure collections”

Modifications of closure collections

Jaroslav Drahoš (1970)

Commentationes Mathematicae Universitatis Carolinae

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A construction of the projective modification for a closure-set of a presheaf

Jaroslav Drahoš (1971)

Commentationes Mathematicae Universitatis Carolinae

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Under an inductivity condition the stalks of the covering space of a presheaf are isomorphic (inductive and projective modifications of closurations of presheaves)

Jaroslav Drahoš (1979)

Acta Universitatis Carolinae. Mathematica et Physica

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Combinatorial Grassmannians

Andrzej Owsiejczuk (2007)

Formalized Mathematics

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In the paper I construct the configuration G which is a partial linear space. It consists of k-element subsets of some base set as points and (k + 1)-element subsets as lines. The incidence is given by inclusion. I also introduce automorphisms of partial linear spaces and show that automorphisms of G are generated by permutations of the base set.