Results 21 to 30 of about 359,812 (282)

Error-Correcting Codes on Projective Bundles over Deligne–Lusztig Varieties

open access: yesMathematics, 2023
The aim of this article is to give lower bounds on the parameters of algebraic geometric error-correcting codes constructed from projective bundles over Deligne–Lusztig surfaces.
Daniel Camazón Portela   +1 more
doaj   +1 more source

Geometry and topological photonics

open access: yesJournal of Optics, 2023
Abstract Topological photonics provides a powerful framework to describe and understand many nontrivial wave phenomena in complex electromagnetic platforms. The topological index of a physical system is an abstract global property that depends on the family of operators that describes the propagation of Bloch waves.
openaire   +2 more sources

Three weak solutions for a Neumann elliptic equations involving the p→(x)\vec p\left( x \right)-Laplacian operator

open access: yesNonautonomous Dynamical Systems, 2020
The aim of this paper is to establish the existence of at least three weak solutions for the following elliptic Neumann problem {-Δp→(x)u+α(x)|u|p0(x)-2u=λf(x,u)inΩ,∑i=1N|∂u∂xi|pi(x)-2∂u∂xiγi=0on∂Ω,\left\{ {\matrix{ { - {\Delta _{\vec p\left( x \right)}}
Ahmed Ahmed   +1 more
doaj   +1 more source

Boundedness of Multidimensional Dunkl-Hausdorff Operators

open access: yesJournal of Function Spaces, 2020
In the present paper, we introduce the multidimensional Dunkl-Hausdorff operator ℋκ and we give simple sufficient conditions so that these operators be bounded on the weighted lebesgue spaces Lκpℝn and in the Hardy space Hκ1ℝn associated with the Dunkl ...
Radouan Daher, Faouaz Saadi
doaj   +1 more source

An Application of Total-Colored Graphs to Describe Mutations in Non-Mendelian Genetics

open access: yesMathematics, 2019
Any gene mutation during the mitotic cell cycle of a eukaryotic cell can be algebraically represented by an isotopism of the evolution algebra describing the genetic pattern of the inheritance process.
Raúl M. Falcón   +2 more
doaj   +1 more source

Geometry and Topology of Escape I: Epistrophes [PDF]

open access: yes, 2003
We consider a dynamical system given by an area-preserving map on a two-dimensional phase plane and consider a one-dimensional line of initial conditions within this plane.
Delos, J. B.   +4 more
core   +3 more sources

On the initial singularity and extendibility of flat quasi-de Sitter spacetimes

open access: yesJournal of High Energy Physics, 2023
Inflationary spacetimes have been argued to be past geodesically incomplete in many situations. However, whether the geodesic incompleteness implies the existence of an initial spacetime curvature singularity or whether the spacetime may be extended ...
Ghazal Geshnizjani   +2 more
doaj   +1 more source

Supernovae observations and cosmic topology [PDF]

open access: yes, 2005
Two fundamental questions regarding our description of the Universe concern the geometry and topology of its 3-dimensional space. While geometry is a local characteristic that gives the intrinsic curvature, topology is a global feature that characterizes
Alcaniz   +30 more
core   +1 more source

Some Algebraic Symmetries of (2,2)-Supersymmetric Systems [PDF]

open access: yes, 1999
The Hilbert spaces of supersymmetric systems admit symmetries which are often related to the topology and geometry of the (target) field-space. Here, we study certain (2,2)-supersymmetric systems in 2-dimensional spacetime which are closely related to ...
Hübsch T., TRISTAN HÜBSCH
core   +4 more sources

Time-Inhomogeneous Diffusion Geometry and Topology

open access: yesSIAM Journal on Mathematics of Data Science, 2023
Diffusion condensation is a dynamic process that yields a sequence of multiscale data representations that aim to encode meaningful abstractions. It has proven effective for manifold learning, denoising, clustering, and visualization of high-dimensional data.
Guillaume Huguet   +7 more
openaire   +4 more sources

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