Results 11 to 20 of about 787,356 (301)

Closure operators I [PDF]

open access: yesTopology and its Applications, 1987
Closure operators form a familiar tool in topology. The authors introduce an abstract notion of closure operator in the realm of arbitrary categories. It turns out that there is a close connection between closure operators and factorization structures (for sinks).
DIKRANJAN, Dikran, . Giuli E.
openaire   +4 more sources

On general closure operators and quasi factorization structures [PDF]

open access: yesCategories and General Algebraic Structures with Applications, 2021
In this article the notions of quasi mono (epi) as a generalization of mono (epi), (quasi weakly hereditary) general closure operator $\mathbf{C}$ on a category $\mathcal{X}$ with respect to a class $\mathcal{M}$ of morphisms, and quasi factorization ...
Seyed Shahin Mousavi Mirkalai   +2 more
doaj   +1 more source

The Role of Soft θ-Topological Operators in Characterizing Various Soft Separation Axioms

open access: yesJournal of Mathematics, 2022
This manuscript begins with an introduction to a soft θ-kernel operator. Then, the main properties and connections of this soft topological operator with other known soft topological operators are examined.
Zanyar A. Ameen   +3 more
doaj   +1 more source

Closure operators on algebras [PDF]

open access: yesInternational Journal of Algebra and Computation, 2015
We study connections between closure operators on an algebra (A, Ω) and congruences on the extended power algebra defined on the same algebra. We use these connections to give an alternative description of the lattice of all subvarieties of semilattice ordered algebras.
Agata Pilitowska, Anna Zamojska-Dzienio
openaire   +3 more sources

Closure operators and projections on involution posets [PDF]

open access: yes, 1974
Investigations of closure operators on an involution poset T lead to a certain type of closure operators (so called c-closure operators) that are closely related to projections on ...
Rüttimann, Gottfried T.
core   +2 more sources

A Theory of Closure Operators [PDF]

open access: yes, 2008
We explore how fixed-point operators can be designed to interact and be composed to form autonomic control mechanisms. We depart from the idea that an operator is idempotent only for the states that it assures, and define a more general concept in which acceptable states are a superset of assurable states.
Alva L. Couch, Marc Chiarini
openaire   +2 more sources

General method for including Stueckelberg fields

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
A systematic procedure is proposed for inclusion of Stueckelberg fields. The procedure begins with the involutive closure when the original Lagrangian equations are complemented by all the lower order consequences.
S. L. Lyakhovich
doaj   +1 more source

Operational closure and stability [PDF]

open access: yesAnnals of Pure and Applied Logic, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Correctness of Closure Collapsing (appendix to conference submission) [PDF]

open access: yes, 2006
A description in the Jacobs and Langen domain is a set of sharing groups where each sharing group is a set of program variables. The presence of a sharing group in a description indicates that all the variables in the group can be bound to terms that ...
Li, Xuan   +5 more
core   +1 more source

Novel Characterizations of $LM$-Fuzzy Open Operators [PDF]

open access: yesTransactions on Fuzzy Sets and Systems, 2022
In this paper, we present some characterizations of the $LM$-fuzzy interior operator, the $LM$-fuzzy closure operator, $LM$-fuzzy semiopen operator and $LM$-fuzzy preopen operator in an $LM$-fuzzy topological space.
Fu-Gui Shi
doaj   +1 more source

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