Results 41 to 50 of about 2,916,570 (322)

Finite rank and pseudofinite groups

, 2018
It is proven that an infinite finitely generated group cannot be elementarily equivalent to an ultraproduct of finite groups of a given Pr\"ufer rank.
Palacín, Daniel
core   +1 more source

Finite-rank Bratteli-Vershik diagrams are expansive—a new proof [PDF]

, 2014
Downarowicz and Maass (Ergod. Th. and Dynam. Sys. 28 (2008), 739–747) proved that the Cantor minimal system associated to a properly ordered Bratteli diagram of finite rank is either an odometer system or an expansive system.
Siri-Mal'en Hoynes
semanticscholar   +1 more source

Automorphism groups of finite topological rank [PDF]

Transactions of the American Mathematical Society, 2017
We offer a criterion for showing that the automorphism group of an ultrahomogeneous structure is topologically 2-generated and even has a cyclically dense conjugacy class.
Itay Kaplan, Pierre Simon
semanticscholar   +1 more source

Planarity ranks for varieties of equationally noetherian semigroups [PDF]

Известия Саратовского университета. Новая серия: Математика. Механика. Информатика
The problem of describing semigroup varieties with finite planarity rank is researched. In addition to the previously obtained results the author finds new countable infinite series of semigroup varieties with finite planarity rank.
Solomatin, Denis Vladimirovich
doaj   +1 more source

Logics of Finite Hankel Rank

, 2015
We discuss the Feferman-Vaught Theorem in the setting of abstract model theory for finite structures. We look at sum-like and product-like binary operations on finite structures and their Hankel matrices.
A Durand, B Courcelle, B Godlin, B Mahr, CC Chang, E Grädel, G Kreisel, H-D Ebbinghaus, J Barwise, JA Makowsky, JA Makowsky, JA Makowsky, JA Makowsky, JA Makowsky, JA Makowsky, JW Carlyle, KJ Barwise, KJ Compton, L Lovász, M Freedman, N Immerman, P Lindström, P Lindström, S Feferman, S Feferman, S Feferman, S Feferman, S Feferman, S Shelah, Y Gurevich   +29 more
core   +1 more source

Asymptotic Properties of Spearman's Rank Correlation for Variables with Finite Support. [PDF]

PLoS ONE, 2016
The asymptotic variance and distribution of Spearman's rank correlation have previously been known only under independence. For variables with finite support, the population version of Spearman's rank correlation has been derived.
Petra Ornstein, Johan Lyhagen
doaj   +1 more source

On conformal Jordan cells of finite and infinite rank

, 2004
This work concerns in part the construction of conformal Jordan cells of infinite rank and their reductions to conformal Jordan cells of finite rank. It is also discussed how a procedure similar to Lie algebra contractions may reduce a conformal Jordan ...
I. Bakas, J. Rasmussen, Jørgen Rasmussen, M. Flohr, M.R. Gaberdiel, M.R. Rahimi Tabar, V. Gurarie   +6 more
core   +1 more source

Binary simple homogeneous structures are supersimple with finite rank [PDF]

, 2014
Suppose that M is an infinite structure with finite relational vocabulary such that every relation symbol has arity at most 2. If M is simple and homogeneous, then its complete theory is supersimple with finite SU-rank which cannot exceed the number of ...
Vera Koponen
semanticscholar   +1 more source

Indecomposable injective modules of finite Malcev rank over local commutative rings

, 2013
It is proven that each indecomposable injective module over a valuation domain $R$ is polyserial if and only if each maximal immediate extension $\widehat{R}$ of $R$ is of finite rank over the completion $\widetilde{R}$ of $R$ in the $R$-topology.
Couchot, Francois
core   +2 more sources

Examples of finite free complexes of small rank and small homology [PDF]

, 2017
This work concerns finite free complexes over commutative noetherian rings, in particular over group algebras of elementary abelian groups. The main contribution is the construction of complexes such that the total rank of their underlying free modules ...
S. Iyengar, M. Walker
semanticscholar   +1 more source