Conditions aux limites approchées pour les couches minces périodiques
Conditions aux limites approchées pour les couches minces périodiques
Nous écrivons et nous justifions des conditions aux limites approchées pour des couches minces périodiques recouvrant un objet parfaitement conducteur en polarisation transverse électrique et transverse magnétique.
Conditions de positivité dans une variété symplectique complexe. Applications à l'étude de l'hypoellipticité analytique
Conditions for periodic vibrations in a symmetric n-string
A symmetric N-string is a network of N ≥ 2 sections of string tied together at one common mobile extremity. In their equilibrium position, the sections of string form N angles of 2π/N at their junction point. Considering the initial and boundary value problem for small-amplitude oscillations perpendicular to the plane of the N-string at rest, we obtain conditions under which the solution will be periodic with an integral period.
Conditions for the time global existence and nonexistence of a compact support of solutions to the Cauchy problem for quasilinear degenerate parabolic equations.
Conditions implying regularity of the three dimensional Navier-Stokes equation
We obtain logarithmic improvements for conditions for regularity of the Navier-Stokes equation, similar to those of Prodi-Serrin or Beale-Kato-Majda. Some of the proofs make use of a stochastic approach involving Feynman-Kac-like inequalities. As part of our methods, we give a different approach to a priori estimates of Foiaş, Guillopé and Temam.
Conditions of Prodi-Serrin's type for local regularity of suitable weak solutions to the Navier-Stokes equations
In the context of suitable weak solutions to the Navier-Stokes equations we present local conditions of Prodi-Serrin’s type on velocity and pressure under which is a regular point of . The conditions are imposed exclusively on the outside of a sufficiently narrow space-time paraboloid with the vertex and the axis parallel with the -axis.
Cone invariance and squeezing properties for inertial manifolds for nonautonomous evolution equations
In this paper we summarize an abstract approach to inertial manifolds for nonautonomous dynamical systems. Our result on the existence of inertial manifolds requires only two geometrical assumptions, called cone invariance and squeezing property, and some additional technical assumptions like boundedness or smoothing properties. We apply this result to processes (two-parameter semiflows) generated by nonautonomous semilinear parabolic evolution equations.
Conformal Geometry and the Composite Membrane Problem
We show that a certain eigenvalue minimization problem in two dimensions for the Laplace operator in conformal classes is equivalent to the composite membrane problem. We again establish such a link in higher dimensions for eigenvalue problems stemming from the critical GJMS operators. New free boundary problems of unstable type arise in higher dimensions linked to the critical GJMS operator. In dimension four, the critical GJMS operator is exactly the Paneitz operator.
Conformal invariance and time decay for non linear wave equations. II
Conformal invariance and time decay for non linear wave equations. I
Conformal metrics with constant -curvature.
Conformally Invariant Systems of Nonlinear PDE of Liouville Type.
Connections between spatial decay of initial data and time asymptotics in a supercritical parabolic equation
Connections in scalar reaction diffusion equations with Neumann boundary conditions
Conservation laws. I: Viscosity solutions.
Conservation laws. II: Weak solutions.
Conservation laws. III: Relaxation limit.
Constant Coefficient Differential Operators with Slowly Spreading Solutions.
Constructing universal pattern formation processes governed by reaction-diffusion systems.