Existence de l-formes fermées non singulières dans une classe de cohomologie de de Rham
Existence de lois de conservation dans le cas cyclique
Existence des applications harmoniques et courbure des variétés
Existence et compacité d'immersions isométriques elliptiques
Existence of a closed geodesic on -convex sets
Existence of critical sub-solutions of the Hamilton–Jacobi equation on compact manifolds
Existence of conservation laws in nilpotent case.
Existence of critical points for some noncoercive functionals
Existence of four solutions of some nonlinear Hamiltonian system.
Existence of geodesics for the Lorentz metric of a stationary gravitational field
Existence of guided cylindrical TM-modes in a homogeneous self-focusing dielectric
Existence of infinitely many distinct solutions to the quasirelativistic Hartree-Fock equations.
Existence of infinitely many nodal solutions for a superlinear Neumann boundary value problem.
Existence of infinitely many solutions for elliptic boundary-value problems with nonsymmetrical critical nonlinearity.
Existence of metrics with harmonic curvature and non parallel Ricci tensor.
Existence of Metrics With Prescribed Ricci Curvature: Local Theory.
Existence of multiple critical points for an asymptotically quadratic functional with applications.
Existence of nontrivial solutions for semilinear problems with strictly differentiable nonlinearity.
Existence of nonzero solutions for a class of damped vibration problems with impulsive effects
In this paper, a class of damped vibration problems with impulsive effects is considered. An existence result is obtained by using the variational method and the critical point theorem due to Brezis and Nirenberg. The obtained result is also valid and new for the corresponding second-order impulsive Hamiltonian system. Finally, an example is presented to illustrate the feasibility and effectiveness of the result.
Existence of periodic solutions of linear Hamiltonian systems with sublinear perturbation.