Results 121 to 130 of about 6,505 (255)

Minimal sequential Hausdorff spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2004
A sequential space (X, T) is called minimal sequential if no sequential topology on X is strictly weaker than T. This paper begins the study of minimal sequential Hausdorff spaces. Characterizations of minimal sequential Hausdorff spaces are obtained using filter bases, sequences, and functions satisfying certain graph conditions.
openaire   +2 more sources

On Multilevel Energy‐Based Fragmentation Methods

open access: yesInternational Journal of Quantum Chemistry, Volume 126, Issue 3, January 30, 2026.
We investigate the working equations of energy‐based fragmentation methods and present ML‐SUPANOVA, a Möbius‐inversion‐based multilevel fragmentation scheme that enables adaptive, quasi‐optimal truncations to efficiently approximate Born‐Oppenheimer potentials across hierarchies of electronic‐structure methods and basis sets.
James Barker   +2 more
wiley   +1 more source

On non-separable components of hyperspaces with the Hausdorff metric [PDF]

open access: yesМатематичні Студії, 2011
Let $(X,d)$ be a connected non compact metric space. Suppose the metric$d$ convex and such that every closed bounded subset of $X$ is compact. Let $F(X)$ bethe space of nonvoid closed subsets of $X$ with the Hausdorff distance associated to $d$.We prove ...
R. Cauty
doaj  

Connected Mappings of Hausdorff Spaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1958
Pervin, William J., Levine, Norman
openaire   +1 more source

Embeddings Into Countably Compact Hausdorff Spaces [PDF]

open access: green, 2023
Тарас Банах   +2 more
openalex   +1 more source

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