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arxiv: math/0609351 · v1 · submitted 2006-09-13 · 🧮 math.GN

Cardinal invariants for C-cross topologies

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keywords invariantsc-crosscardinaldensetopologiescomparedconsideredintroduced
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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.

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