EuDML | Browse

Items

All a b c d e f g h i j k l m n o p q r s t u v w x y z Other

Page 1 Next

Displaying 1 – 20 of 80

$S$ -categories

Miroslav Hušek (1964)

Commentationes Mathematicae Universitatis Carolinae

Samuel compactification and uniform coreflection of nearness $σ$ -frames

Inderasan Naidoo (2006)

Czechoslovak Mathematical Journal

We introduce the structure of a nearness on a $σ$ -frame and construct the coreflection of the category $𝐍 σ F r m$ of nearness $σ$ -frames to the category $𝐊 R e g σ F r m$ of compact regular $σ$ -frames. This description of the Samuel compactification of a nearness $σ$ -frame is in analogy to the construction by Baboolal and Ori for nearness frames in [1] and that of Walters for uniform $σ$ -frames in [11]. We also construct the uniform coreflection of a nearness $σ$ -frame, that is, the coreflection of the category of $𝐍 σ F r m$ to the category...

Saunders Mac Lane, the knight of mathematics.

Kutateladze, S.S. (2005)

Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]

Searching for more absolute CR-epic spaces.

Barr, Michael, Kennison, John F., Raphael, R. (2009)

Theory and Applications of Categories [electronic only]

Semiconvex compacta

Oleh R. Nykyforchyn (1997)

Commentationes Mathematicae Universitatis Carolinae

We define and investigate a generalization of the notion of convex compacta. Namely, for semiconvex combination in a semiconvex compactum we allow the existence of non-trivial loops connecting a point with itself. It is proved that any semiconvex compactum contains two non-empty convex compacta, the center and the weak center. The center is the largest compactum such that semiconvex combination induces a convex structure on it. The convex structure on the weak center does not necessarily coincide...