Results 101 to 110 of about 13,469,908 (217)
(m,n)-Semirings and a Generalized Fault-Tolerance Algebra of Systems
Journal of Applied Mathematics, 2013 We propose a new class of mathematical structures called (m,n)-semirings (which generalize the usual semirings) and describe their basic properties. We define partial ordering and generalize the concepts of congruence, homomorphism, and so forth, for (m ...
Syed Eqbal Alam +2 more
doaj +1 more source
Water Resources Research, Volume 62, Issue 9, September 2026.Abstract Achieving high prediction accuracy while maintaining low‐complexity and interpretability has been a critical challenge in streamflow forecasting. To address this issue, this study proposes an improved reservoir computing (RC) framework that simultaneously supports structural inference and dynamic forecasting of streamflow‐meteorology networks.
Longxia Qian +4 more
wiley +1 more source
A NOTE ON THE HOMOMORPHISM THEOREM FOR HEMIRINGS
, 2014 . The fundamental homomorphism theorem for rings is not generally applicable in hemiring theory. In this paper, we show that for the class of N-homomorphism of hemirings the fundamental theorem is valid. In addition, the concept of N-homomorphism is used
D. M. Olson
core
Anti Homomorphism in Fuzzy Subgroups [PDF]
, 2018 On the basis of fuzzy sets introduced by L.A. Zadeh, we first gave the definition of fuzzy subgroups and fuzzy normal subgroups. This paper proves a necessary and sufficient condition of fuzzy subgroup (normal subgroup) to be fuzzy subgroup (normal ...
S. Subramanian , Dr. +1 more
core
When do homomorphism counts help in query algorithms? [PDF]
A query algorithm based on homomorphism counts is a procedure for determining whether a given instance satisfies a property by counting homomorphisms between the given instance and finitely many predetermined instances.
Dalmau, Víctor +3 more
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The Complexity of Homomorphism Factorization [PDF]
, 2019 We investigate the computational complexity of the problem of deciding if an algebra homomorphism can be factored through an intermediate algebra. Specifically, we fix an algebraic language, L, and take as input an algebra homomorphism f: X --> Z between
Berg, Kevin Michael
core +4 more sources
A note on power invariant rings
International Journal of Mathematics and Mathematical Sciences, 1981 Let R be a commutative ring with identity and R((n))=R[[X1,…,Xn]] the power series ring in n independent indeterminates X1,…,Xn over R. R is called power invariant if whenever S is a ring such that R[[X1]]≅S[[X1]], then R≅S. R is said to be forever-power-
Joong Ho Kim
doaj +1 more source
The alternating central extension for the positive part of Uq(slˆ2)
Nuclear Physics B, 2019 This paper is about the positive part Uq+ of the quantum group Uq(slˆ2). The algebra Uq+ has a presentation with two generators A,B that satisfy the cubic q-Serre relations. Recently we introduced a type of element in Uq+, said to be alternating.
Paul Terwilliger
doaj +1 more source
Geometry of essential matrix ranges and the Smith–Ward problem for operator systems
Bulletin of the London Mathematical Society, Volume 58, Issue 9, September 2026.Abstract A d$d$‐tuple of bounded linear selfadjoint operators acting on an infinite‐dimensional separable Hilbert space is said to have the Smith–Ward property if the identity map of the image of the operator system in the Calkin algebra has a completely positive lift.
Douglas Farenick +2 more
wiley +1 more source
Geometric inverse semigroup theory: a note on the Milnor–Schwarz lemma for inverse monoids
Bulletin of the London Mathematical Society, Volume 58, Issue 9, September 2026.Abstract We generalise the Milnor–Schwarz lemma to inverse monoids acting on presheaves of geodesic metric spaces. We provide two proofs of this fact: one only uses elementary techniques, inspired by the arguments for group actions on metric spaces; the other involves a version of the Vietoris–Rips complex, and builds on work of Chung–Martínez–Szakács.
Giorgio Mangioni, Francesco Tesolin
wiley +1 more source