Results 21 to 30 of about 167 (147)
Gradual Sets: An Approach to Fuzzy Sets
Advances in Fuzzy Systems, Volume 2023, Issue 1, 2023., 2023 In the fuzzy theory of sets and groups, the use of α‐levels is a standard to translate problems from the fuzzy to the crisp framework. Using strong α‐levels, it is possible to establish a one to one correspondence which makes possible doubly, a gradual and a functorial treatment of the fuzzy theory.
Josefa M. García +2 more
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Some Characterizations for Approximate Biflatness of Semigroup Algebras
Journal of Mathematics, Volume 2023, Issue 1, 2023., 2023 In this paper, we study an approximate biflatness of l1(S), where S is a Clifford semigroup. Indeed, we show that a Clifford semigroup algebra l1(S) is approximately biflat if and only if every maximal subgroup of S is amenable, E(S) is locally finite, and l1(S) has an approximate identity in c00(S).
N. Razi, A. Sahami, Faranak Farshadifar
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Duality for powerset coalgebras [PDF]
Logical Methods in Computer Science, 2022 Let CABA be the category of complete and atomic boolean algebras and complete boolean homomorphisms, and let CSL be the category of complete meet-semilattices and complete meet-homomorphisms. We show that the forgetful functor from CABA to CSL has a left
Guram Bezhanishvili +2 more
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Multi-argument specialization semilattices [PDF]
Mathematica BohemicaIf $X$ is a closure space with closure $K$, we consider the semilattice $(\mathcal P(X), \cup)$ endowed with a further relation $ x \sqsubseteq\{ y_1, y_2, \dots, y_n\} $ between elements of $\mathcal P(X)$ and finite subsets of $\mathcal P(X)$, whose ...
Paolo Lipparini
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Semigroups Through Semilattices [PDF]
Transactions of the American Mathematical Society, 1970 Presented in this paper is a method of constructing a compact semi- group 5 from a compact semilattice Xand a compact semigroup T having idempotents contained in X. The notions of semigroups (straight) through chains and (straight) through semilattices are introduced. It is shown that the notion of a semigroup through a chain is equivalent to that of a
Carruth, J. H., Lawson, J. D.
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On general n-ary hyperstructure semilattices [PDF]
Journal of Hyperstructures, 2016 In this paper, the n-ary hyperstructure will be applied to some aspects of lattice theory. We introduce the concepts of general n-ary hyperstructure semilattice ( or gnh-semilattice) and Gnh-subsemilattice, ideal of gnh-semilattice, gno-order, Gnoorder ...
Akbar Dehghan Nezhad, Najmeh Khajuee
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On the Equational Base of SMB Algebras
Mathematics, 2023 The “semilattices of Mal’cev blocks”, for short SMB algebras, were defined by A. Bulatov. In a recently accepted paper by P. Đapić, P. Marković, R. McKenzie, and A.
Petar Đapić +2 more
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Monotone and cone preserving mappings on posets [PDF]
Mathematica Bohemica, 2023 We define several sorts of mappings on a poset like monotone, strictly monotone, upper cone preserving and variants of these. Our aim is to study in which posets some of these mappings coincide.
Ivan Chajda, Helmut Länger
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Polymorphism-homogeneity and universal algebraic geometry [PDF]
Discrete Mathematics & Theoretical Computer Science, 2022 We assign a relational structure to any finite algebra in a canonical way, using solution sets of equations, and we prove that this relational structure is polymorphism-homogeneous if and only if the algebra itself is polymorphism-homogeneous.
Endre Tóth, Tamás Waldhauser
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EXISTENTIALLY CLOSED BROUWERIAN SEMILATTICES [PDF]
The Journal of Symbolic Logic, 2019 AbstractThe variety of Brouwerian semilattices is amalgamable and locally finite; hence, by well-known results [19], it has a model completion (whose models are the existentially closed structures). In this article, we supply a finite and rather simple axiomatization of the model completion.
CARAI, LUCA, GHILARDI, SILVIO
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