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Generalized Ricci solitons on homogeneous Siklos space-times [PDF]

open access: yesAUT Journal of Mathematics and Computing
In this paper, the class of homogeneous Siklos space-times is considered from algebraic point of view and the generalized Ricci solitons are completely classified.
Amirhesam Zaeim   +2 more
doaj   +1 more source

Unified representation of homogeneous and quasi-homogenous systems in geometrothermodynamics

open access: yesPhysics Letters B, 2023
We analyze homogeneous and quasi-homogeneous thermodynamic systems within the formalism of geometrothermodynamics (GTD). A generalized Euler identity is used to obtain the explicit form of the three Legendre invariant metrics that are known in GTD for ...
Hernando Quevedo, María N. Quevedo
doaj   +1 more source

ON THE ALMOST PERIODIC AT INFINITY FUNCTIONS FROM HOMOGENEOUS SPACES

open access: yesПроблемы анализа, 2018
We consider homogeneous spaces of functions defined on the real axis (or semi-axis) with values in a complex Banach space. We study the new class of almost periodic at infinity functions from homogeneous spaces.
Baskakov A. G.   +2 more
doaj   +1 more source

Concentrated Force Action on 1/8 Homogeneous Isotropic Space

open access: yesНаука и техника, 2020
Using the example of vertical displacements, it is shown that by combining a solution to the problem of determining vertical displacements from the action of four identical concentrated forces symmetrically applied to an elastic half-space and two ...
S. V. Bosakov, P. D. Skachok
doaj   +1 more source

On generic homogeneous vector fields

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2022
Background. The study of dynamical systems with symmetry is of both theoretical and applied interest. Phase portraits of dynamical systems defined by homogeneous vector fields are invariant with respect to the phase space dilation group.
V.Sh. Roytenberg
doaj   +1 more source

POINTWISE MULTIPLICATION IN THE REALIZED HOMOGENEOUS BESOV AND TRIEBEL-LIZORKIN SPACES

open access: yesПроблемы анализа, 2018
For either homogeneous Besov spaces B_(s;p,q)(R_n) or homogeneous Triebel-Lizorkin spaces F_(s;p,q)(R_n), with the conditions either s < n/p, or s = n/p and q ≤ 1 in the B_(s;p,q)-case, p ≤ 1 in the F_(s;p,q)-case, we prove some pointwise multiplication ...
Madani Moussai, Samira Bissar
doaj   +1 more source

To Clarify Decision on Action of Concentrated Force to Elastic Quarter-Space for Arbitrary Poisson’s Ratio

open access: yesНаука и техника, 2022
Previously, the author obtained an analytical solution for determining the vertical displacements of the homogeneous isotropic quarter-space face, which is affected by a vertical concentrated force.
S. V. Bosakov
doaj   +1 more source

Four-dimensional quasi-Einstein non-reductive homogeneous spaces are Einstein

open access: yesExtracta Mathematicae
We investigate quasi-Einstein structures on four-dimensional non-reductive homogeneous spaces. We show that contrary to the Ricci solitons structures, quasi-Einstein structures display a strong rigidity in the sense that every such a structure is ...
Mohamed Tahar Kadaoui Abbassi   +1 more
doaj   +1 more source

The homogeneous structure in a Cartan space

open access: yesLietuvos Matematikos Rinkinys, 2013
The homogeneus almost product structure on the Finsler space have Lieviu Popescu studied. In this paper we study the integrability conditions for the homogeneus product structure in Cartan space with Miron connection.
Edmundas Mazėtis
doaj   +1 more source

Acoustic wave speed in aerogels across material classes: density scaling from theory and experiments

open access: yesScientific Reports
Understanding the propagation of elastic waves in ultra-light porous solids is essential for linking their microstructure to macroscopic properties and mechanical performance.
Ameya Rege   +8 more
doaj   +1 more source

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