Some generalizations of the concept of a p-space

Abstract

In this article, some generalizations of the concept of a p-space are introduced and studied. The notion of a source of a space in a larger space and the concepts of partial plumage, s-embedding, p-embedding, p ⁎ -embedding, s-space, and p ⁎ -space are defined and studied in depth (see Theorems 2.6, 2.7, 3.2, 4.3, 4.4, 4.10 and their corollaries). An example of a hereditarily p ⁎ -space which is not a p-space and is a perfect image of a hereditarily p-space is indicated (Example 2.9). Among the main results, we establish that if a paracompact space X is p-embedded in a pseudocompact space as a dense subspace, then X is a p-space (Corollary 4.8), and that if X has a countable network and is p ⁎ -embedded in a pseudocompact space, then X is metrizable (Corollary 4.11). The following problem is posed: is every paracompact G δ -subspace of a pseudocompact space Čech-complete?