학술저널
ON COCYCLIC MAPS AND COCATEGORY
- 충청수학회
- Journal of the Chungcheong Mathematical Society
- Volume 24, No. 1
-
2011.02137 - 140 (4 pages)
- 5
It is known [5] that the concepts of Ck-spaces and those can be characterized using by the Gottlieb sets and the LS category of spaces as follows; A space X is a Ck-space if and only if the Gottlieb set G(Z;X) = [Z;X] for any space Z with cat Z k. In this paper, we introduce a dual concept of Ck-space and obtain a dual result of the above result using the dual Gottlieb set and the dual LS category.
1. Introduction
2. DCk-spaces
(0)
(0)