On a local Lipschitz constant of the maps related to -decomposition.
On a lower bound for the first eigenvalue of the Laplace operator on a riemannian manifold
On a lower bound of the second eigenvalue of the Laplacian on an Einstein space
On a min-max procedure for the existence of a positive solution for certain scalar field equations in RN.
In this paper we mainly introduce a min-max procedure to prove the existence of positive solutions for certain semilinear elliptic equations in RN.
On a multiplicativity up to homotopy of the Gugenheim map.
On a new normalization for tractor covariant derivatives
A regular normal parabolic geometry of type on a manifold gives rise to sequences of invariant differential operators, known as the curved version of the BGG resolution. These sequences are constructed from the normal covariant derivative on the corresponding tractor bundle , where is the normal Cartan connection. The first operator in the sequence is overdetermined and it is well known that yields the prolongation of this operator in the homogeneous case . Our first main result...
On a Pair of Connections on a Principal Fibre Bundle
On a parabolic strongly nonlinear problem on manifolds.
On a partial complex structure
On a Purely ?Riemannian" Proof of the Structure and Dimension of the Unramified Moduli Space of a Compact Riemann Surface.
On a quantum differential structure.
On a real Monge-Ampère functional.
On a remarkable functional equation in the theory of generalized Dunkl operators and transformations of elliptic genera.
On a solvability condition for systems with an injective symbol in terms of iterations of double layer potentials.
On a superlinear elliptic equation
On a synthetic proof of the Ambrose-Palais-Singer theorem for infinitesimally linear spaces
On a theorem of H. Hopf.
On a theorem of J. Peetre
On a two-point boundary value problem for second-order differential inclusions on Riemannian manifolds.
On a variational theory of light rays on Lorentzian manifolds
In this Note, by using a generalization of the classical Fermat principle, we prove the existence and multiplicity of lightlike geodesics joining a point with a timelike curve on a class of Lorentzian manifolds, satisfying a suitable compactness assumption, which is weaker than the globally hyperbolicity.