Results 41 to 50 of about 974 (238)

Locally pure topological abelian groups: elementary invariants

open access: yesAnnals of Pure and Applied Logic, 1983
Traditional model theory deals with first-order theories of algebraic systems. A basic result in the model theory of abelian groups, obtained by Szmielew [13] in 1955, is the decidability of the full theory of abelian groups. Szmielew uses the method of elimination of quantifiers, which typically produces the sharpest results.
Cherlin, G., Schmitt, P. H.
openaire   +2 more sources

Vector bundles on bielliptic surfaces: Ulrich bundles and degree of irrationality

open access: yesMathematische Nachrichten, EarlyView.
Abstract This paper deals with two problems about vector bundles on bielliptic surfaces. The first is to give a classification of Ulrich bundles on such surfaces S$S$, which depends on the topological type of S$S$. In doing so, we study the weak Brill–Noether property for moduli spaces of sheaves with isotropic Mukai vector. Adapting an idea of Moretti
Edoardo Mason
wiley   +1 more source

Integration the relativistic wave equations in Bianchi IX cosmology model [PDF]

open access: yesКомпьютерные исследования и моделирование, 2016
We consider integration Clein-Gordon and Dirac equations in Bianchi IX cosmology model. Using the noncommutative integration method we found the new exact solutions for Taub universe. Noncommutative integration method for Bianchi IX model is based on the
Alexander Igorevich Breev   +2 more
doaj   +1 more source

A Characterization of Multipliers of the Herz Algebra

open access: yesAxioms, 2023
For the characterization of multipliers of Lp(Rd) or more generally, of Lp(G) for some locally compact Abelian group G, the so-called Figa-Talamanca–Herz algebra Ap(G) plays an important role.
Hans G. Feichtinger
doaj   +1 more source

Elementary Abelian $p$ Subgroups of Lie Groups

open access: yesPublications of the Research Institute for Mathematical Sciences, 1991
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kane, Richard, Notbohm, Dietrich
openaire   +2 more sources

Aggregation and the Structure of Value

open access: yesNoûs, EarlyView.
ABSTRACT Roughly, the view I call “Additivism” sums up value across time and people. Given some standard assumptions, I show that Additivism follows from two principles. The first says that how lives align in time cannot, in itself, matter. The second says, roughly, that a world cannot be better unless it is better within some period or another.
Weng Kin San
wiley   +1 more source

Laws and Reasons Why

open access: yesAnalytic Philosophy, EarlyView.
ABSTRACT Laws play some role in explanations: at the very least, they somehow connect what is explained, or the explanandum, to what explains, or the explanans. Thus, thermodynamical laws connect the match's being struck and its lightning, so that the former causes the latter; and laws about set formation connect Socrates' existence with {Socrates}'s ...
Julio De Rizzo
wiley   +1 more source

Elementary theory of free non-abelian groups

open access: yesJournal of Algebra, 2006
For a group \(G,\) the elementary theory \(\text{Th}(G)\) of \(G\) is the set of all first-order sentences in the language of group theory which are true in \(G.\) Around 1945 Tarski formulated two conjectures about the elementary theory of a free group.
Kharlampovich, Olga, Myasnikov, Alexei
openaire   +1 more source

What If Each Voxel Were Measured With a Different Diffusion Protocol?

open access: yesMagnetic Resonance in Medicine, Volume 95, Issue 4, Page 2277-2290, April 2026.
ABSTRACT Purpose Expansion of diffusion MRI (dMRI) both into the realm of strong gradients and into accessible imaging with portable low‐field devices brings about the challenge of gradient nonlinearities. Spatial variations of the diffusion gradients make diffusion weightings and directions non‐uniform across the field of view, and deform perfect ...
Santiago Coelho   +7 more
wiley   +1 more source

On a group of the form $2^{11}:M_{24}$ [PDF]

open access: yesAUT Journal of Mathematics and Computing
The Conway group $Co_{1}$ is one of the $26$ sporadic simple groups. It is the largest of the three Conway groups with order $4157776806543360000=2^{21}.3^9.5^4.7^2.11.13.23$ and has $22$ conjugacy classes of maximal subgroups.
Vasco Mugala   +2 more
doaj   +1 more source

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