An essay on the Interpolation Theorem of Józef Marcinkiewicz - Polish patriot
An estimate for a fundamental solution of a parabolic equation with drift on a Riemannian manifold.
An estimate on the hessian of the heat kernel
An estimate on the relative Morse index for strongly indefinite functionals.
An Example of Moduli for Singular Symplec-tic Forms
An Example on the Heisenberg Group Related to the Levy Operator.
An existence result for minimal spheres in manifolds boundary
We prove the existence of a not homotopically trivial minimal sphere in a 3-manifold with boundary, obtained by deleting an open connected subset from a compact Riemannian oriented 3-manifold with boundary, having trivial second homotopy group.
An existence theorem for a non-regular variational problem.
An Existence Theorem for Harmonic Maps.
An Existence Theorem for Harmonic Sections.
An explicite description of harmonic measure.
An expression of classical dynamics
An extension of a multiplicity theorem by Ricceri with an application to a class of quasilinear equations
A recent multiplicity result by Ricceri, stated for equations in Hilbert spaces, is extended to a wider class of Banach spaces. Applications to nonlinear boundary value problems involving the p-Laplacian are presented.
An extension of Miller's version of the de Rham Theorem with any coefficients
In this paper we present an approximation to the de Rham theorem for simplicial sets with any coefficients based, using simplicial techniques, on Poincaré's lemma and q-extendability.
An extension of the Newton-Puiseux polygon construction to give solutions of Pfaffian forms
We give a proof of the fact that any holomorphic Pfaffian form in two variables has a convergent integral curve. The proof gives an effective method to construct the solution, and we extend it to get a Gevrey type solution for a Gevrey form.
An extension of the topological degree in Hilbert space.
An extension to fields of positive characteristic of Mather's construction of the Thom-Boardman sequence
An idempotent for a Jordanian quantum complex sphere
A new Jordanian quantum complex 4-sphere together with an instanton-type idempotent is obtained as a suspension of the Jordanian quantum group .
An immersion of a differential space in a Cartesian space
An implicit function theorem in Banach spaces