Results 21 to 30 of about 19,126 (247)
On the geometry of lattices and finiteness of Picard groups [PDF]
, 2019 Let (K, O, k) be a p-modular system with k algebraically closed and O unramified, and let Λ be an O-order in a separable K-algebra. We call a Λ-lattice L rigid if Ext1Λ(L, L) = 0, in analogy with the definition of rigid modules over a finite-dimensional ...
Eisele, F.
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Compact elements in the lattice of varieties [PDF]
Mathematica Bohemica, 2005 Summary: We prove that the lattice of varieties contains almost no compact elements.
Ježek, J., Slavík, V.
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On the ascending and descending chain conditions in the lattice of monoid varieties [PDF]
, 2019 In this work we consider monoids as algebras with an associative binary operation and the nullary operation that fixes the identity element. We found an example of two varieties of monoids with finite subvariety lattices such that their join covers one ...
Gusev, S. V.
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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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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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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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The possible values of critical points between strongly congruence-proper varieties of algebras [PDF]
, 2014 We denote by Conc(A) the semilattice of all finitely generated congruences of an (universal) algebra A, and we define Conc(V) as the class of all isomorphic copies of all Conc(A), for A in V, for any variety V of algebras.
Elliott +24 more
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The Amalgamation Property for Varieties of Lattices [PDF]
Transactions of the American Mathematical Society, 1984 There are precisely three varieties of lattices that satisfy the amalgamation property: trivial lattices, distributive lattices, and all lattices.
Day, Alan, Ježek, Jaroslav
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The Subquasivariety Lattice of a Discriminator Variety
Advances in Mathematics, 2001 The quaterny discriminator on a set \(M\) is the mapping \(d:M^4\to M\) defined by \(d(x,y,z,w):=z\) if \(x=y\) and \(d(x,y,z,w):=w\) otherwise. A variety is called a discriminator variety if it is generated by a class \({\mathbf K}\) of algebras of the same type such that there exists a term representing the quaternary discriminator on every algebra ...
Blanco, Javier +2 more
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On singularities of lattice varieties [PDF]
, 2013 Toric varieties associated with distributive lattices arise as a fibre of a flat degeneration of a Schubert variety in a minuscule. The singular locus of these varieties has been studied by various authors.
Mukherjee, Himadri
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