Browsing Repositorio Ciencias by Author "Okunev, O"

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Homeomorphisms of function spaces and hereditary cardinal invariants

Okunev, O (1997)

A space X is called a t-image of Y if C-p(X) is homeomorphic to a subspace of C-p(Y). We prove that if Y is a t-image of X, then Y is a countable union of images of X under almost lower semicontinuous finite-valued mappings ...
Minkowski sums of point sets defined by inequalities

Pasko, A; Okunev, O; Savchenko, V (2003)

The existing approaches support Minkowski sums for the boundary, set-theoretic, and ray representations of solids. In this paper, we consider the Minkowski sum operation in the context of geometric modeling using real ...
On the Cech number of C-P(X)

Okunev, O; Tamariz, A (2004)

We discuss the tech numbers of the spaces C-p(X) and Cp(X, I) (where the tech number of a space Z is the pseudocharacter of Z in Z). We establish the relation between the tech numbers of C-p(X) and of C-p(X, I), find some ...
On thin generating sets in topological groups

Okunev, O; Tkacenko, M (1998)

If a discrete subset S of a topological group G with identity 1 generates a dense subgroup of G and S boolean OR {1} is closed in G, then S is called a suitable set for G. We show that every almost metrizable topological ...

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