Add to ORKGsummary:We provide new proofs for the classical insertion theorems of Dowker and Michael. The proofs are geometric in nature and highlight the connection with the preservation of normality in products. Both proofs follow directly from the Kat\v{e}tov-Tong insertion theorem and we also discuss a proof of this
A proof of the following theorem is given, answering an open problem attributed to Kunen: suppose th...
AbstractIt is proved that if all Fσ-sets in the product X × Y are δ-normal, then either X is normal ...
summary:We present a direct constructive proof of full normality for a class of spaces (locales) tha...
Abstract. We provide new proofs for the classical insertion theorems of Dowker and Michael. The proo...
summary:We provide new proofs for the classical insertion theorems of Dowker and Michael. The proofs...
summary:Normal spaces are characterized in terms of an insertion type theorem, which implies the Kat...
summary:Normal spaces are characterized in terms of an insertion type theorem, which implies the Kat...
In this paper we prove two strict insertion theorems for frame homomorphisms. When applied to the f...
AbstractIn this paper we prove two strict insertion theorems for frame homomorphisms. When applied t...
AbstractWe consider the problem of inserting continuous functions between pairs of semicontinuous fu...
AbstractIn this paper we prove two strict insertion theorems for frame homomorphisms. When applied t...
summary:A family of subsets of a set is called a $\sigma $-topology if it is closed under arbitrary ...
summary:A family of subsets of a set is called a $\sigma $-topology if it is closed under arbitrary ...
summary:A family of subsets of a set is called a $\sigma $-topology if it is closed under arbitrary ...
Abstract♦ implies that there is a perfectly normal X such that X × X is normal but not countably par...
A proof of the following theorem is given, answering an open problem attributed to Kunen: suppose th...
AbstractIt is proved that if all Fσ-sets in the product X × Y are δ-normal, then either X is normal ...
summary:We present a direct constructive proof of full normality for a class of spaces (locales) tha...
Abstract. We provide new proofs for the classical insertion theorems of Dowker and Michael. The proo...
summary:We provide new proofs for the classical insertion theorems of Dowker and Michael. The proofs...
summary:Normal spaces are characterized in terms of an insertion type theorem, which implies the Kat...
summary:Normal spaces are characterized in terms of an insertion type theorem, which implies the Kat...
In this paper we prove two strict insertion theorems for frame homomorphisms. When applied to the f...
AbstractIn this paper we prove two strict insertion theorems for frame homomorphisms. When applied t...
AbstractWe consider the problem of inserting continuous functions between pairs of semicontinuous fu...
AbstractIn this paper we prove two strict insertion theorems for frame homomorphisms. When applied t...
summary:A family of subsets of a set is called a $\sigma $-topology if it is closed under arbitrary ...
summary:A family of subsets of a set is called a $\sigma $-topology if it is closed under arbitrary ...
summary:A family of subsets of a set is called a $\sigma $-topology if it is closed under arbitrary ...
Abstract♦ implies that there is a perfectly normal X such that X × X is normal but not countably par...
A proof of the following theorem is given, answering an open problem attributed to Kunen: suppose th...
AbstractIt is proved that if all Fσ-sets in the product X × Y are δ-normal, then either X is normal ...
summary:We present a direct constructive proof of full normality for a class of spaces (locales) tha...