Results 21 to 30 of about 19,007 (230)
Lattices of completely regular semigroup varieties [PDF]
Pacific Journal of Mathematics, 1985 Let S be a regular semigroup, E(S) its set of idempotents, \({\mathcal C}(S)\) its congruence lattice. For \(\rho\in {\mathcal C}(S)\), the kernel and the trace of \(\rho\) is defined by ker \(\rho\) \(=\{x\in S\); \(x\rho\) e for \(e\in E(S)\}\), tr \(\rho\) \(=\rho | E(S)\). The sets \(T_{\rho}=\{\theta \in {\mathcal C}(S)\); tr \(\rho\) \(=tr \theta
Pastijn, F. J., Trotter, P. G.
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The Order of Hypersubstitutions of Type (2,1)
International Journal of Mathematics and Mathematical Sciences, 2011 Hypersubstitutions are mappings which map operation symbols to terms of the corresponding arities. They were introduced as a way of making precise the concept of a hyperidentity and generalizations to 𝑀-hyperidentities.
Tawhat Changphas, Wonlop Hemvong
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Tropical Theta Functions and Log Calabi-Yau Surfaces [PDF]
, 2016 We generalize the standard combinatorial techniques of toric geometry to the study of log Calabi-Yau surfaces. The character and cocharacter lattices are replaced by certain integral linear manifolds described by Gross, Hacking, and Keel, and monomials ...
Mandel, Travis
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Derived categories and Kummer varieties [PDF]
, 2006 We prove that if two abelian varieties have equivalent derived categories then the derived categories of the smooth stacks associated to the corresponding Kummer varieties are equivalent as well.
Stellari, Paolo
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A view of canonical extension [PDF]
, 2010 This is a short survey illustrating some of the essential aspects of the theory of canonical extensions. In addition some topological results about canonical extensions of lattices with additional operations in finitely generated varieties are given.
B. Jónsson +10 more
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Varieties of unary-determined distributive $\ell$-magmas and bunched implication algebras [PDF]
Logical Methods in Computer ScienceA distributive lattice-ordered magma ($d\ell$-magma) $(A,\wedge,\vee,\cdot)$ is a distributive lattice with a binary operation $\cdot$ that preserves joins in both arguments, and when $\cdot$ is associative then $(A,\vee,\cdot)$ is an idempotent semiring.
Natanael Alpay +2 more
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Lattices of Subsemivarieties of Certain Varieties [PDF]
Journal of the Australian Mathematical Society, 1971 For all positive integers m, n, m ≤ n, let m,n denote the variety of algebras with m n-ary operations ω1, …, ωm and n m-ary operations φ1, …, φn satisfying the system of identities The varieties m,n are considered by Swierczkowski [1] and by Akataeb and Smirnov [2]. Jonsson and Tarski [3] consider m,n in the case m = 1, n = 2.
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International Journal of Mathematics and Mathematical Sciences, 1992 We show that there are varieties of somewhat different loop soliton lattices when we specify an integration path in No Integrability Aesthetic Field Theory. These are illustrated using two dimensional computer maps.
M. Muraskin
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Isogeny graphs of ordinary abelian varieties [PDF]
, 2016 Fix a prime number $\ell$. Graphs of isogenies of degree a power of $\ell$ are well-understood for elliptic curves, but not for higher-dimensional abelian varieties.
Brooks, Ernest Hunter +2 more
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Structural biology of ferritin nanocages
FEBS Letters, EarlyView.Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley +1 more source