Results 11 to 20 of about 78,289 (273)

The Hanf number for amalgamation of coloring classes [PDF]

open access: yes, 2015
We study amalgamation properties in a family of abstract elementary classes that we call coloring classes. The family includes the examples previously studied in previous work of Baldwin, Kolesnikov, and Shelah.
Kolesnikov, Alexei, Lambie-Hanson, Chris
core   +1 more source

A Note on Regular De Morgan Semi-Heyting Algebras

open access: yesDemonstratio Mathematica, 2016
The purpose of this note is two-fold. Firstly, we prove that the variety RDMSH1 of regular De Morgan semi-Heyting algebras of level 1 satisfies Stone identity and present (equational) axiomatizations for several subvarieties of RDMSH1.
Sankappanavar Hanamantagouda P.
doaj   +1 more source

Amalgamation Property in the subvarieties of Gautama and Almost Gautama Algebras [PDF]

open access: yesJournal of Mahani Mathematical Research
Gautama algebras were introduced in 2022, as a common generalization of regular double Stone algebras and regular Kleene Stone algebras. Even more recently, Gautama algebras were further generalized to Almost Gautama algebras (AG for short).
Juan M. Cornejo   +1 more
doaj   +1 more source

Positive families and Boolean chains of copies of ultrahomogeneous structures

open access: yesComptes Rendus. Mathématique, 2020
A family of infinite subsets of a countable set $X$ is called positive iff it is closed under supersets and finite changes and contains a co-infinite set.
Kurilić, Miloš S.   +1 more
doaj   +1 more source

Strong amalgamations of lattice ordered groups and modules

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1993
We show that every variety of representable lattice ordered groups fails the strong amalgamation property. The same result holds for the variety of f-modules over an f-ring.
Mona Cherri, Wayne B. Powell
doaj   +1 more source

Permanence of approximation properties for discrete quantum groups [PDF]

open access: yes, 2014
We prove several results on the permanence of weak amenability and the Haagerup property for discrete quantum groups. In particular, we improve known facts on free products by allowing amalgamation over a finite quantum subgroup.
Freslon, Amaury
core   +2 more sources

First-principles calculations to investigate structural, elastic and thermodynamic properties of new M2ScSnC2 (M=V or Nb) quaternary compounds for 312 MAX phases

open access: yesJournal of Materials Research and Technology, 2023
In this research, the approach of FP-LAPW (full potential linearized augmented plane wave) is employed within WIEN2K for the investigations of structural, thermodynamic, electronic, and mechanical properties of the V2ScSnC2 and Nb2ScSnC2 MAX-phases ...
Mohammed Bendjemai   +8 more
doaj   +1 more source

Dynamic millimeter-wave OAM beam generation through programmable metasurface

open access: yesNanophotonics, 2022
Millimeter-wave (mmWave) and orbital angular momentum (OAM) multiplexing are two key technologies for modern wireless communications, where significant efforts have been devoted to combining these two technologies for extremely high channel capacities ...
Bai Xudong   +6 more
doaj   +1 more source

Amalgamation and Ramsey properties of L spaces

open access: yesAdvances in Mathematics, 2020
We study the dynamics of the group of isometries of $L_p$-spaces. In particular, we study the canonical actions of these groups on the space of $ $-isometric embeddings of finite dimensional subspaces of $L_p(0,1)$ into itself, and we show that for $p \neq 4,6,8,\ldots$ they are $\varepsilon$-transitive provided that $ $ is small enough.
Ferenczi, V.   +3 more
openaire   +2 more sources

Fraïssé limit via forcing [PDF]

open access: yesJournal of Mahani Mathematical Research
Suppose $\mathcal{L}$ is a finite relational language and $\mathcal{K}$ is a class of finite $\mathcal{L}$-structures closed under substructures and isomorphisms.
Mohammad Golshani
doaj   +1 more source

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