In this paper we obtain the following results: (1) Perfect mappings preserve C-stratifiable (C-semi-stratifiable, KCsemi-stratifiable) spaces. (2) The image of a C-stratifiable space under a closed mapping need not be...In this paper we obtain the following results: (1) Perfect mappings preserve C-stratifiable (C-semi-stratifiable, KCsemi-stratifiable) spaces. (2) The image of a C-stratifiable space under a closed mapping need not be C-semi-stratifiable space. (3) The image of a C-stratifiable space under a pseudo-open K-mapping is a C-semi-stratifiable space.展开更多
In this paper, by msss_mappings, the relations between metric spaces and spaces with σ _locally countable cs_networks or spaces with σ _locally countable weak bases are established. These are some answers to A...In this paper, by msss_mappings, the relations between metric spaces and spaces with σ _locally countable cs_networks or spaces with σ _locally countable weak bases are established. These are some answers to Alexandroff’s problems.展开更多
In this paper, we give the characteristics of the coefficient multipliers from H p,G p,B p(0【p【1) and A p(0【p≤1) to G q(1≤q【∞), from G p to G q(1≤p≤q【∞).
文摘In this paper we obtain the following results: (1) Perfect mappings preserve C-stratifiable (C-semi-stratifiable, KCsemi-stratifiable) spaces. (2) The image of a C-stratifiable space under a closed mapping need not be C-semi-stratifiable space. (3) The image of a C-stratifiable space under a pseudo-open K-mapping is a C-semi-stratifiable space.
文摘In this paper, by msss_mappings, the relations between metric spaces and spaces with σ _locally countable cs_networks or spaces with σ _locally countable weak bases are established. These are some answers to Alexandroff’s problems.
文摘In this paper, we give the characteristics of the coefficient multipliers from H p,G p,B p(0【p【1) and A p(0【p≤1) to G q(1≤q【∞), from G p to G q(1≤p≤q【∞).
