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Stochastic processes --- Stochastic analysis. --- Stochastic differential equations. --- Analyse stochastique --- Equations différentielles stochastiques --- Stochastic analysis --- Flows (Differentiable dynamical systems) --- Stochastic differential equations --- Equations différentielles stochastiques
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The aim of the book is to study some aspects of geometric evolutions, such as mean curvature flow and anisotropic mean curvature flow of hypersurfaces. We analyze the origin of such flows and their geometric and variational nature. Some of the most important aspects of mean curvature flow are described, such as the comparison principle and its use in the definition of suitable weak solutions. The anisotropic evolutions, which can be considered as a generalization of mean curvature flow, are studied from the view point of Finsler geometry. Concerning singular perturbations, we discuss the convergence of the Allen–Cahn (or Ginsburg–Landau) type equations to (possibly anisotropic) mean curvature flow before the onset of singularities in the limit problem. We study such kinds of asymptotic problems also in the static case, showing convergence to prescribed curvature-type problems.
Mathematics --- Physical Sciences & Mathematics --- Geometry --- Mathematics. --- Geometry. --- Euclid's Elements --- Math --- Science --- Curvature. --- Flows (Differentiable dynamical systems) --- Differentiable dynamical systems --- Calculus --- Curves --- Surfaces
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This book aims to provide a self-contained introduction to the local geometry of the stochastic flows. It studies the hypoelliptic operators, which are written in Hörmander's form, by using the connection between stochastic flows and partial differential equations. The book stresses the author's view that the local geometry of any stochastic flow is determined very precisely and explicitly by a universal formula referred to as the Chen-Strichartz formula. The natural geometry associated with the Chen-Strichartz formula is the sub-Riemannian geometry, and its main tools are introduced throughou
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"In this memoir, we show the existence of the first non trivial family of classical global solutions of the inviscid surface quasi-geostrophic equation"--
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Differential geometry. Global analysis --- Flows (Differentiable dynamical systems) --- Flows (Differentieerbare systemen) --- Flows (Systèmes dynamiques différentiables) --- Hamiltonian systems --- Hamiltonsystemen --- Perturbatie (Wiskunde) --- Perturbation (Mathematics) --- Perturbation (Mathématiques) --- Systèmes hamiltoniens --- Tore (Geometrie) --- Torus (Geometry) --- Torus (Meetkunde) --- Hamiltonian systems. --- Flows (Differentiable dynamical systems). --- Perturbation (Mathematics). --- Torus (Geometry).
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Operator theory --- Differentiable dynamical systems --- Flows (Differentiable dynamical systems) --- Hyperbolic spaces --- Invariant manifolds --- Invariants --- Manifolds (Mathematics) --- Hyperbolic complex manifolds --- Manifolds, Hyperbolic complex --- Spaces, Hyperbolic --- Geometry, Non-Euclidean --- Differential dynamical systems --- Dynamical systems, Differentiable --- Dynamics, Differentiable --- Differential equations --- Global analysis (Mathematics) --- Topological dynamics --- Differentiable dynamical systems. --- Systèmes dynamiques. --- Hyperbolic spaces. --- Espaces hyperboliques. --- Invariant manifolds. --- Variétés invariantes. --- Flows (Differentiable dynamical systems).
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Differential geometry. Global analysis --- Geodesic flows. --- Flots géodésiques. --- Riemannian manifolds. --- Riemann, Variétés de. --- Geodesic flows --- Riemannian manifolds --- Manifolds, Riemannian --- Riemannian space --- Space, Riemannian --- Geometry, Differential --- Manifolds (Mathematics) --- Flows (Differentiable dynamical systems)
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Topology --- Flows (Differentiable dynamical systems) --- Topological dynamics. --- Intersection theory (Mathematics) --- Flots (dynamique différentiable) --- Dynamique topologique. --- Intersections, Théorie des. --- Intersection theory --- Topological dynamics --- Dynamics, Topological --- Differentiable dynamical systems --- Geometry, Algebraic