Results 21 to 30 of about 1,217,812 (237)

Differential algebraic Lie algebras [PDF]

open access: yesTransactions of the American Mathematical Society, 1979
A class of infinite-dimensional Lie algebras over the field K \mathcal {K} of constants of a universal differential field U \mathcal {U} is studied. The simplest case, defined by homogeneous linear differential equations, is analyzed in detail, and those with underlying set
openaire   +1 more source

Self-Dual Normal Basis of a Galois Ring

open access: yesJournal of Mathematics, 2014
Let R′=GR(ps,psml) and R=GR(ps,psm) be two Galois rings. In this paper, we show how to construct normal basis in the extension of Galois rings, and we also define weakly self-dual normal basis and self-dual normal basis for R′ over R, where R′ is ...
Irwansyah   +3 more
doaj   +1 more source

A new model of the free monogenic digroup

open access: yesМатематичні Студії, 2023
It is well-known that one of open problems in the theory of Leibniz algebras is to find a suitable generalization of Lie’s third theorem which associates a (local) Lie group to any Lie algebra, real or complex. It turns out, this is related to finding an
Yu. V. Zhuchok, G. F. Pilz
doaj   +1 more source

Cohomology of Presheaves of Monoids

open access: yesMathematics, 2020
The purpose of this work is to extend Leech cohomology for monoids (and so Eilenberg-Mac Lane cohomology of groups) to presheaves of monoids on an arbitrary small category.
Pilar Carrasco, Antonio M. Cegarra
doaj   +1 more source

Hom-Akivis algebras [PDF]

open access: yes, 2010
Hom-Akivis algebras are introduced. The commutator-Hom-associator algebra of a non-Hom-associative algebra (i.e. a Hom-nonassociative algebra) is a Hom-Akivis algebra.
Issa, A. Nourou
core   +2 more sources

Omni-Lie 2-algebras and their Dirac structures [PDF]

open access: yes, 2011
We introduce the notion of omni-Lie 2-algebra, which is a categorification of Weinstein's omni-Lie algebras. We prove that there is a one-to-one correspondence between strict Lie 2-algebra structures on 2-sub-vector spaces of a 2-vector space $\V$ and ...
Baez   +14 more
core   +1 more source

All missing Ramsey numbers for trees versus the four-page book

open access: yesElectronic Journal of Graph Theory and Applications, 2021
For the Ramsey number r(Tn, Bm), where Tn denotes a tree of order n and Bm denotes the m-page book K2 + bar(K)m, it is known that r(Tn, Bm)=2n − 1 if n ≥ 3m − 3. In case of n < 3m − 3, r(Tn, Bm) has not been completely evaluated except for m ≤ 3. Here
Roland Lortz, Ingrid Mengersen
doaj   +1 more source

Analytic solution for tachyon condensation in open string field theory

open access: yes, 2005
We propose a new basis in Witten's open string field theory, in which the star product simplifies considerably. For a convenient choice of gauge the classical string field equation of motion yields straightforwardly an exact analytic solution that ...
Martin Schnabl, Star Algebra
core   +2 more sources

Bridging Artificial Intelligence and Neurological Signals (BRAINS): A Novel Framework for Electroencephalogram-Based Image Generation

open access: yesInformation
Recent advancements in cognitive neuroscience, particularly in electroencephalogram (EEG) signal processing, image generation, and brain–computer interfaces (BCIs), have opened up new avenues for research.
Mateo Sokač   +3 more
doaj   +1 more source

Open-string vertex algebras, tensor categories and operads

open access: yes, 2003
We introduce notions of open-string vertex algebra, conformal open-string vertex algebra and variants of these notions. These are ``open-string-theoretic,'' ``noncommutative'' generalizations of the notions of vertex algebra and of conformal vertex ...
Borcherds   +12 more
core   +1 more source

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