Search results for "Gradient flow"

showing 3 items of 3 documents

Geometry and analysis of Dirichlet forms

2012

Let $ \mathscr E $ be a regular, strongly local Dirichlet form on $L^2(X, m)$ and $d$ the associated intrinsic distance. Assume that the topology induced by $d$ coincides with the original topology on $ X$, and that $X$ is compact, satisfies a doubling property and supports a weak $(1, 2)$-Poincar\'e inequality. We first discuss the (non-)coincidence of the intrinsic length structure and the gradient structure. Under the further assumption that the Ricci curvature of $X$ is bounded from below in the sense of Lott-Sturm-Villani, the following are shown to be equivalent: (i) the heat flow of $\mathscr E$ gives the unique gradient flow of $\mathscr U_\infty$, (ii) $\mathscr E$ satisfies the Ne…

Mathematics(all)General MathematicsPoincaré inequalityMetric measure space01 natural sciencesMeasure (mathematics)Length structuresymbols.namesakeMathematics - Metric GeometrySierpinski gasketGradient flowClassical Analysis and ODEs (math.CA)FOS: Mathematics0101 mathematicsRicci curvatureHeat kernelMathematicsDirichlet formProbability (math.PR)010102 general mathematicsMathematical analysista111Differential structureMetric Geometry (math.MG)Functional Analysis (math.FA)Sierpinski triangleMathematics - Functional Analysis010101 applied mathematicsRicci curvatureMathematics - Classical Analysis and ODEsPoincaré inequalityBounded functionsymbolsBalanced flowDirichlet formIntrinsic distanceMathematics - ProbabilityAdvances in Mathematics
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Gradient flows in random walk spaces

2021

El món digital ha comportat l'aparició de molts tipus de dades, de mida i complexitat creixents. De fet, els dispositius moderns ens permeten obtenir fàcilment imatges de major resolució, així com recopilar dades sobre cerques a la xarxa, anàlisis sanitàries, xarxes socials, sistemes d'informació geogràfica, etc. En conseqüència, l'estudi i el tractament d'aquests grans conjunts de dades té un gran interès i valor. En aquest sentit, els grafs ponderats proporcionen un espai de treball natural i flexible on representar les dades. En aquest context, un vèrtex representa una dada concreta i a cada aresta se li assigna un pes segons alguna mesura de semblança adequadament triada entre els vèrte…

:MATEMÁTICAS [UNESCO]markov processescheeger problemrof modelnonlocal nonlinear partial differential equationsgradient flowsrandom walk spacescalculus of variationsevolution problemsUNESCO::MATEMÁTICAS
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Numerical Stochastic Perturbation Theory and the Gradient Flow

2013

We study the Yang-Mills gradient flow using numerical stochastic perturbation theory. As an application of the method we consider the recently proposed gradient flow coupling in the Schr\"odinger functional for the pure SU(3) gauge theory.

PhysicsMathematical analysisNumerical algorithmHigh Energy Physics - Lattice (hep-lat)FOS: Physical sciencesLattice QCDYang–Mills theoryPerturbation theoryPoincaré–Lindstedt methodFIS/02 - FISICA TEORICA MODELLI E METODI MATEMATICIsymbols.namesakeLangevin equationHigh Energy Physics::TheoryHamiltonian lattice gauge theoryHigh Energy Physics - LatticeMean field theoryFlow (mathematics)Gradient flowsymbolsGauge theoryPerturbation theoryk·p perturbation theoryMathematical physics
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