Add to ORKGsummary:We prove that if $X^n$ is a union of $n$ subspaces of pointwise countable type then the space $X$ is of pointwise countable type. If $X^\omega $ is a countable union of ultracomplete spaces, the space $X^\omega $ is ultracomplete. We give, under CH, an example of a Čech-complete, countably compact and non-ultracomplete space, giving thus a partial answer to a question asked in [BY2]
2 c Ginsburg and Saks have proved that if the power X is countably compact, X is a Hausdorff space, ...
AbstractA general theorem (Theorem 1) concerning when spaces are not ultrapure in the sense of Arhan...
2 c Ginsburg and Saks have proved that if the power X is countably compact, X is a Hausdorff space, ...
summary:We prove that if $X^n$ is a union of $n$ subspaces of pointwise countable type then the spac...
summary:We prove that if $X^n$ is a union of $n$ subspaces of pointwise countable type then the spac...
We study spaces X which have a countable outer base in βX; they are called ultracomplete in the most...
AbstractIn 1987 V.I. Ponomarev and V.V. Tkachuk characterized strongly complete topological spaces a...
summary:In 1998, S. Romaguera [13] introduced the notion of cofinally Čech-complete spaces equivalen...
Abstract. A subspace Y of a space X is absolutely countably compact(=acc) (str-ongly absolutely coun...
AbstractIt is shown that countable products of completely regular absolute Cδ spaces inherit each of...
[EN] We study spaces X which have a countable outer base in βX; they are called ultracomplete in the...
In 1987 V.I. Ponomarev and V.V. Tkachuk characterized strongly complete topological spaces as those ...
We establish that a Čech-complete space X must be subcompact if it has a dense subspace representabl...
AbstractIn 1987 V.I. Ponomarev and V.V. Tkachuk characterized strongly complete topological spaces a...
Abstract. A γ-space with a strictly positive measure is separable. An example of a non-separable γ−s...
2 c Ginsburg and Saks have proved that if the power X is countably compact, X is a Hausdorff space, ...
AbstractA general theorem (Theorem 1) concerning when spaces are not ultrapure in the sense of Arhan...
2 c Ginsburg and Saks have proved that if the power X is countably compact, X is a Hausdorff space, ...
summary:We prove that if $X^n$ is a union of $n$ subspaces of pointwise countable type then the spac...
summary:We prove that if $X^n$ is a union of $n$ subspaces of pointwise countable type then the spac...
We study spaces X which have a countable outer base in βX; they are called ultracomplete in the most...
AbstractIn 1987 V.I. Ponomarev and V.V. Tkachuk characterized strongly complete topological spaces a...
summary:In 1998, S. Romaguera [13] introduced the notion of cofinally Čech-complete spaces equivalen...
Abstract. A subspace Y of a space X is absolutely countably compact(=acc) (str-ongly absolutely coun...
AbstractIt is shown that countable products of completely regular absolute Cδ spaces inherit each of...
[EN] We study spaces X which have a countable outer base in βX; they are called ultracomplete in the...
In 1987 V.I. Ponomarev and V.V. Tkachuk characterized strongly complete topological spaces as those ...
We establish that a Čech-complete space X must be subcompact if it has a dense subspace representabl...
AbstractIn 1987 V.I. Ponomarev and V.V. Tkachuk characterized strongly complete topological spaces a...
Abstract. A γ-space with a strictly positive measure is separable. An example of a non-separable γ−s...
2 c Ginsburg and Saks have proved that if the power X is countably compact, X is a Hausdorff space, ...
AbstractA general theorem (Theorem 1) concerning when spaces are not ultrapure in the sense of Arhan...
2 c Ginsburg and Saks have proved that if the power X is countably compact, X is a Hausdorff space, ...