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Admissible congruences on type B semigroups

open access: yesOpen Mathematics, 2022
The main aim of this article is to study admissible congruences on a type B semigroup. First, we give characterizations of the minimum admissible congruence whose trace is a normal congruence on a type B semigroup.
Li Chunhua   +3 more
doaj   +1 more source

Convex congruences [PDF]

open access: yesSoft Computing, 2016
For an algebra [Formula: see text] belonging to a quasivariety [Formula: see text], the quotient [Formula: see text] need not belong to [Formula: see text] for every [Formula: see text]. The natural question arises for which [Formula: see text]. We consider algebras [Formula: see text] of type (2, 0) where a partial order relation is determined by the ...
Chajda, Ivan, Länger, Helmut
openaire   +3 more sources

Nonholomorphic Ramanujan-type congruences for Hurwitz class numbers [PDF]

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2020
Olivia Beckwith   +2 more
exaly   +2 more sources

Congruences modulo $4$ for the number of $3$-regular partitions

open access: yesComptes Rendus. Mathématique, 2023
The last decade has seen an abundance of congruences for $b_\ell (n)$, the number of $\ell $-regular partitions of $n$. Notably absent are congruences modulo $4$ for $b_3(n)$. In this paper, we introduce Ramanujan type congruences modulo $4$ for $b_3(2n)$
Ballantine, Cristina, Merca, Mircea
doaj   +1 more source

Families of Ramanujan-Type Congruences Modulo 4 for the Number of Divisors

open access: yesAxioms, 2022
In this paper, we explore Ramanujan-type congruences modulo 4 for the function σ0(n), counting the positive divisors of n. We consider relations of the form σ08(αn+β)+r≡0(mod4), with (α,β)∈N2 and r∈{1,3,5,7}.
Mircea Merca
doaj   +1 more source

Congruence for Structural Congruences [PDF]

open access: yes, 2005
Structural congruences have been used to define the semantics and to capture inherent properties of language constructs. They have been used as an addendum to transition system specifications in Plotkin’s style of Structural Operational Semantics (SOS).
Mousavi, M.R., Reniers, M.A.
openaire   +2 more sources

The lattice of (2, 1)-congruences on a left restriction semigroup

open access: yesOpen Mathematics, 2022
All the (2, 1)-congruences on a left restriction semigroup become a complete sublattice of its lattice of congruences. The aim of this article is to study certain fundamental properties of this complete sublattice.
Liu Haijun, Guo Xiaojiang
doaj   +1 more source

Algebraic Method for Solving System of Linear Congruences

open access: yesRecoletos Multidisciplinary Research Journal, 2015
The paper aimed to devise an alternative algorithm for solving system of linear congruences. This algorithm is an extension of the algebraic algorithm which is an alternative method for finding solutions in linear congruences.
Polemer M. Cuarto
doaj   +1 more source

Ranks For Two Partition Quadruple Functions [PDF]

open access: yes, 2016
Recently the author introduced two new integer partition quadruple functions, which satisfy Ramanujan-type congruences modulo $3$, $5$, $7$, and $13$. Here we reprove the congruences modulo $3$, $5$, and $7$ by defining a rank-type statistic that gives a
Jennings-Shaffer, Chris
core   +3 more sources

Congruence submodularity

open access: yesDiscussiones Mathematicae - General Algebra and Applications, 2002
A lattice \(L\) of equivalence relations on a set \(A\neq \emptyset\) is called \(k\)-submodular \((k\geqq 2\) being a positive integer) if for all \(\theta, \phi, \psi \in L\) with \(\theta \subseteq \psi\) the condition \((\theta,\phi,\theta \dots)\cap \psi\subseteq \theta \vee (\phi\vee \psi)\) (where in the brackets on the left side there are \(k\)
Chajda, Ivan, Halaš, Radomír
openaire   +2 more sources

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