Results 11 to 20 of about 439,115 (199)

Extending algebraic modelling languages for Stochastic Programming [PDF]

open access: yes, 2003
Extending algebraic modelling languages for Stochastic ...
Mitra, G, Sadki, M, Valente, P
core   +6 more sources

An extension for feature algebra [PDF]

open access: yesProceedings of the First International Workshop on Feature-Oriented Software Development, 2009
Feature, algebra was introduced as an abstract framework for feature oriented software development. One goal is to provide a common, clearly defined basis for the key ideas of feature orientation. We first present concrete models for the original axioms of feature algebra which represent the main features of feature oriented programs.
Höfner, Peter   +1 more
openaire   +3 more sources

A Survey on Some Algebraic Characterizations of Hilbert’s Nullstellensatz for Non-commutative Rings of Polynomial Type

open access: yesIngeniería y Ciencia, 2020
In this paper we present a survey of some algebraic characterizations of Hilbert’s Nullstellensatz for non-commutative rings of polynomial type. Using several results established in the literature, we obtain a version of this theorem for the skew ...
Armando Reyes   +1 more
doaj   +1 more source

Onto extensions of free groups [PDF]

open access: yesGroups, Complexity, Cryptology, 2021
An extension of subgroups $H\leqslant K\leqslant F_A$ of the free group of rank $|A|=r\geqslant 2$ is called onto when, for every ambient free basis $A'$, the Stallings graph $\Gamma_{A'}(K)$ is a quotient of $\Gamma_{A'}(H)$.
Sebastià Mijares, Enric Ventura
doaj   +1 more source

Extension of Algebraic Theories [PDF]

open access: yesProceedings of the American Mathematical Society, 1972
The algebraic theories of Lawvere are extended in a natural way to small complete categories. These categories exhibit not only the operations and identities, but some of the homomorphisms, functions, objects and constructions which are encountered when working within the algebraic categories associated with the theories.
Peake, E. J., Peters, G. R.
openaire   +1 more source

Contributions to the essential dimension of finite and algebraic groups [PDF]

open access: yes, 2010
Essential dimension, introduced by Joe Buhler and Zinovy Reichstein and in its most general form by Alexander Merkurjev is a measure of complexity of algebraic objects such as quadratic forms, hermitian forms, central simple algebras and étale algebras ...
Lötscher, Roland
core   +1 more source

Cores of hyperbolic 3-manifolds and limits of Kleinian groups II [PDF]

open access: yes, 1999
Troels Jørgensen conjectured that the algebraic and geometric limits of an algebraically convergent sequence of isomorphic Kleinian groups agree if there are no new parabolics in the algebraic limit.
James W. Anderson   +3 more
core   +1 more source

On extensions of superconformal algebras [PDF]

open access: yesJournal of Mathematical Physics, 2005
Starting from vector fields that preserve a differential form on a Riemann sphere with Grassmann variables, one can construct a superconformal algebra by considering central extensions of the algebra of vector fields. In this paper, the N=4 case is analyzed closely, where the presence of weight zero operators in the field theory forces the introduction
openaire   +3 more sources

On the Krall-type polynomials

open access: yesJournal of Applied Mathematics, 2004
Using a general and simple algebraic approach, some results on Krall-type orthogonal polynomials and some of their extensions are obtained.
R. Álvarez-Nodarse   +2 more
doaj   +1 more source

Some Implicational Semilinear Gaggle Logics: (Dual) Residuated-Connected Logics

open access: yesAxioms, 2022
Implicational partial Galois logics and some of their semilinear extensions, such as semilinear extensions satisfying abstract Galois and dual Galois connection properties, have been introduced together with their relational semantics.
Eunsuk Yang
doaj   +1 more source

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