Search Results - "Misiolek, Gerard"
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Geometric Hydrodynamics in Open Problems
Published in Archive for rational mechanics and analysis (01-04-2023)“…Geometric Hydrodynamics has flourished ever since the celebrated 1966 paper of V. Arnold. In this paper we present a collection of open problems along with…”
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Geometric analysis of the generalized surface quasi-geostrophic equations
Published in Mathematische annalen (2024)“…We investigate the geometry of a family of equations in two dimensions which interpolate between the Euler equations of ideal hydrodynamics and the inviscid…”
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Non-Uniform Dependence on Initial Data of Solutions to the Euler Equations of Hydrodynamics
Published in Communications in mathematical physics (01-05-2010)“…We show that continuous dependence on initial data of solutions to the Euler equations of incompressible hydrodynamics is optimal. More precisely, we prove…”
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On Continuity Properties of Solution Maps of the Generalized SQG Family
Published in Vietnam journal of mathematics (01-07-2024)“…We study a family of active scalar equations which interpolate between the 2D incompressible Euler equations and the (inviscid) surface quasi-geostrophic…”
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Non-Uniform Dependence for the Periodic CH Equation
Published in Communications in partial differential equations (01-06-2010)“…We show that the solution map of the periodic CH equation is not uniformly continuous in Sobolev spaces with exponent greater than 3/2. This extends earlier…”
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Geometry of the Madelung Transform
Published in Archive for rational mechanics and analysis (01-11-2019)“…The Madelung transform is known to relate Schrödinger-type equations in quantum mechanics and the Euler equations for barotropic-type fluids. We prove that,…”
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Persistence properties and unique continuation of solutions of the camassa-holm equation
Published in Communications in mathematical physics (01-04-2007)Get full text
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The Exponential Map of the Group of Area-Preserving Diffeomorphisms of a Surface with Boundary
Published in Archive for rational mechanics and analysis (01-09-2018)“…We prove that the Riemannian exponential map of the right-invariant L 2 metric on the group of volume-preserving diffeomorphisms of a two-dimensional manifold…”
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Axisymmetric Diffeomorphisms and Ideal Fluids on Riemannian 3-Manifolds
Published in International mathematics research notices (01-01-2022)“…Abstract We study the Riemannian geometry of 3D axisymmetric ideal fluids. We prove that the $L^2$ exponential map on the group of volume-preserving…”
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Conjugate and cut points in ideal fluid motion
Published in Annales mathématiques du Québec (01-04-2022)“…Two fluid configurations along a flow are conjugate if there is a one parameter family of geodesics (fluid flows) joining them to infinitesimal order…”
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Integrable Evolution Equations on Spaces of Tensor Densities and Their Peakon Solutions
Published in Communications in mathematical physics (2010)“…We study a family of equations defined on the space of tensor densities of weight λ on the circle and introduce two integrable PDE. One of the equations turns…”
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Generalized Hunter–Saxton equation and the geometry of the group of circle diffeomorphisms
Published in Mathematische annalen (01-11-2008)“…We study an equation lying ‘mid-way’ between the periodic Hunter–Saxton and Camassa–Holm equations, and which describes evolution of rotators in liquid…”
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Fredholm properties of Riemannian exponential maps on diffeomorphism groups
Published in Inventiones mathematicae (2010)“…We prove that exponential maps of right-invariant Sobolev H r metrics on a variety of diffeomorphism groups of compact manifolds are nonlinear Fredholm maps of…”
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CONTINUITY OF THE SOLUTION MAP OF THE EULER EQUATIONS IN HÖLDER SPACES AND WEAK NORM INFLATION IN BESOV SPACES
Published in Transactions of the American Mathematical Society (01-07-2018)“…We construct an example showing that the solution map of the Euler equations is not continuous in the Hölder space from 𝐶¹,𝛼 to L t ∞ C x 1 , α for any 0 <…”
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High-frequency smooth solutions and well-posedness of the Camassa-Holm equation
Published in International Mathematics Research Notices (17-11-2005)“…We construct high-frequency smooth periodic solutions to the Camassa-Holm equation and use them to prove that the related solution map is not uniformly…”
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Euler and Navier–Stokes equations on the hyperbolic plane
Published in Proceedings of the National Academy of Sciences - PNAS (06-11-2012)“…We show that nonuniqueness of the Leray–Hopf solutions of the Navier–Stokes equation on the hyperbolic plane ℍ ² observed by Chan and Czubak is a consequence…”
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Analyticity of the Cauchy problem for an integrable evolution equation
Published in Mathematische annalen (01-11-2003)Get full text
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The Exponential Map Near Conjugate Points In 2D Hydrodynamics
Published in Arnold mathematical journal (01-09-2015)“…We prove that the weak-Riemannian exponential map of the L 2 metric on the group of volume-preserving diffeomorphisms of a compact two-dimensional manifold is…”
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Geometric hydrodynamics via Madelung transform
Published in Proceedings of the National Academy of Sciences - PNAS (12-06-2018)“…We introduce a geometric framework to study Newton’s equations on infinite-dimensional configuration spaces of diffeomorphisms and smooth probability…”
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Conjugate points in the Bott-Virasoro group and the KdV equation
Published in Proceedings of the American Mathematical Society (01-03-1997)“…We study the geometry of a right invariant metric on a central extension \widehat{{\cal D}}(S^1) of the diffeomorphism group of a circle (the Bott-Virasoro…”
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