Perfectly normal compact spaces are continuous images of $\beta \mathbf{N}_{\mathbf{N}}$

Locally Compact Perfectly Normal Spaces May All Be Paracompact

Using results announced by Stevo Todorcevic we establish that if it is consistent that there is a supercompact cardinal then it is consistent that every locally compact perfectly normal space is paracompact. Modulo the large cardinal, this answers a question of S. Watson. We also solve a problem raised by the second author, proving that it is consistent with ZFC that every first countable hered...

Concerning Continuous Images of Compact Ordered Spaces

It is the purpose of this paper to prove that if each of X and Y is a compact Hausdorff space containing infinitely many points, and X X Y is the continuous image of a compact ordered space L, then both X and Fare metrizable.2 The preceding theorem is a generalization of a theorem [l ] by Mardesic and Papic, who assume that X, Y, and L are also connected. Young, in [3], shows that the Cartesian...

On Zero-dimensional Continuous Images of Compact Ordered Spaces

Throughout this paper X denotes a compact and zero-dimensional Hausdorr space. We shall be concerned with Theorem 0.1 The following assertions are equivalent. (A) X is the continuous image of a compact ordered space. (B) X is the continuous image of a zero-dimensional compact ordered space. (C) X has a T 0-separating cross-free family of clopen sets. (D) X has a T 0-separating non-Archimedian f...

Ju n 20 07 A classification of CO spaces which are continuous images of compact ordered spaces 1

A topological space X is called a CO space, if every closed subset of X is homeomorphic to some clopen subset of X. Every ordinal with its order topology is a CO space. This work gives a complete classification of CO spaces which are continuous images of compact ordered spaces. 1 AMS Subject Classification 2000: Primary 06E05. Secondary 54G12, 06A05

On images of continuous functions from a compact manifold to Euclidean space