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In Team Semantics, a dependency notion is strongly first order if every sentence of the logic obtained by adding the corresponding atoms to First Order Logic is equivalent to some first order sentence. In this work it is shown that all…

Logic · Mathematics 2019-02-25 Pietro Galliani

We prove the definability, and actually the finiteness of the commutator width, of many commutator subgroups in groups definable in o-minimal structures. It applies in particular to derived series and to lower central series of solvable…

Logic · Mathematics 2010-06-02 E. Baro , E. Jaligot , M. Otero

We prove a structure theorem for periodic locally soluble groups satisfying a chain condition on intersections of relatively uniformly definable subgroups using results from the theory of stable groups. The result in particular shows that…

Logic · Mathematics 2019-11-06 Jamshid Derakhshan

We shall define a general notion of dimension, and study groups and rings whose interpretable sets carry such a dimensio. In particular, we deduce chain conditions for groups, definability results for fields and domains, and show that…

Logic · Mathematics 2019-09-04 Frank Olaf Wagner

Groups definable in simple theories retain the chain conditions and decomposition properties known from stable groups, up to commensurability. In the small case, if a generic type of G is not foreign to some type q, there is a q-internal…

Group Theory · Mathematics 2008-02-03 Frank Wagner

We prove that for any fixed integers $m\ge 2, t\ge 1, k\ge 2$ a generic $m$-generator $t$-relator group satisfies the Ascending Chain Condition for $k$-generated subgroups.

Group Theory · Mathematics 2023-06-13 Ilya Kapovich

In this paper, we propose an abstract definition of dependent type theories as essentially algebraic theories. One of the main advantages of this definition is its composability: simple theories can be combined into more complex ones, and…

Logic · Mathematics 2017-03-28 Valery Isaev

In this paper, we will prove some sufficient conditions for the solvability of groups.

Group Theory · Mathematics 2009-12-07 Hung P. Tong-Viet

We classify the module categories over the double (possibly twisted) of a finite group.

Quantum Algebra · Mathematics 2007-05-23 Victor Ostrik

We provide a class of inequalities for detecting entanglements in multi-mode systems. Necessary conditions for fully separable, bi-separable and sufficient conditions for fully entangled states are explicitly presented.

Quantum Physics · Physics 2007-05-23 Zong-Guo Li , Shao-Ming Fei , Zhi-Xi Wang , Ke Wu

We prove that certain pairs of ordered structures are dependent. Among these structures are dense and tame pairs of o-minimal structures and further the real field with a multiplicative subgroup with the Mann property, regardless of whether…

Logic · Mathematics 2011-05-03 Ayhan Günaydin , Philipp Hieronymi

Team Semantics generalizes Tarski's Semantics by defining satisfaction with respect to sets of assignments rather than with respect to single assignments. Because of this, it is possible to use Team Semantics to extend First Order Logic via…

Logic · Mathematics 2022-07-01 Pietro Galliani

The completeness of the group classification of systems of two linear second-order ordinary differential equations with constant coefficients is delineated in the paper. The new cases extend what has been done in the literature. These cases…

Classical Analysis and ODEs · Mathematics 2013-03-27 S. V. Meleshko , S. Moyo G. F. Oguis

A group is small if it has countably many complete $n$-types over the empty set for each natural number n. More generally, a group $G$ is weakly small if it has countably many complete 1-types over every finite subset of G. We show here…

Logic · Mathematics 2019-03-01 Cédric Milliet

Working in a theory with an integer-valued dimension on interpretable sets, we classify pseudofinite definably primitive permutation groups acting on one-dimensional sets which satisfy a version of chain condition on centralizers and on…

Logic · Mathematics 2020-07-21 Tingxiang Zou

We completely characterize connected Lie groups all of whose countable subgroups are weakly amenable. We also provide a characterization of connected semisimple Lie groups that are weakly amenable. Finally, we show that a connected Lie…

Functional Analysis · Mathematics 2018-10-17 Søren Knudby

We provide several crucial technical extensions of the theory of stable independence notions in accessible categories. In particular, we describe circumstances under which a stable independence notion can be transferred from a subcategory…

Logic · Mathematics 2022-08-31 Michael Lieberman , Jiri Rosicky , Sebastien Vasey

For a class of irreducible Markov chains with an infinitely countable set of states, we establish a new verifiable necessary and sufficient condition for recurrence and transience. We show that if one of the basic assumptions is not…

Probability · Mathematics 2024-10-08 Vyacheslav M. Abramov

We construct approximately inner actions of discrete amenable groups on strongly amenable subfactors of type II_1 with given invariants, and obtain classification results under some conditions. We also study the lifting of the relative \chi…

Operator Algebras · Mathematics 2007-05-23 Toshihiko Masuda

A group is $\textit{finitely axiomatizable}$ (FA) in a class $\mathcal{C}$ if it can be determined up to isomorphism within $\mathcal{C}$ by a sentence in the first-order language of group theory. We show that profinite groups of various…

Group Theory · Mathematics 2021-05-25 Andre Nies , Dan Segal , Katrin Tent