A construction of the projective modification for a closure-set of a presheaf
Jaroslav Drahoš (1971)
Commentationes Mathematicae Universitatis Carolinae
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Jaroslav Drahoš (1971)
Commentationes Mathematicae Universitatis Carolinae
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Jaroslav Drahoš (1971)
Czechoslovak Mathematical Journal
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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.
Roland Coghetto (2016)
Formalized Mathematics
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The real projective plane has been formalized in Isabelle/HOL by Timothy Makarios [13] and in Coq by Nicolas Magaud, Julien Narboux and Pascal Schreck [12]. Some definitions on the real projective spaces were introduced early in the Mizar Mathematical Library by Wojciech Leonczuk [9], Krzysztof Prazmowski [10] and by Wojciech Skaba [18]. In this article, we check with the Mizar system [4], some properties on the determinants and the Grassmann-Plücker relation in rank 3 [2], [1], [7],...
Gallo, Daniel M. (1997)
Annales Academiae Scientiarum Fennicae. Mathematica
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