Cardinal invariants for C-cross topologies

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C-cross topologies are introduced. Modifcations of the Kuratowski-Ulam Theorem are considered. Cardinal invariants add, cof, cov and non with respect to meager or nowhere dense subsets are compared. Remarks on invariants cof(nwdY) are mentioned for dense subspaces Y of X.
11 pages

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General Topology, Primary: 54A10; Secondary: 03E17, 54E52

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http://salesiana.dossiersoluciones.com/handle/123456789/116495

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0609351
 http://arxiv.org/abs/math/0609351

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arXiv