In this work, we study existence and non existence for the Dirichlet problem for the minimal graph equation in non convex domains of the plane. We search for conditions on the boundary data which be the less restricted ...

In this work we study equations that describe laminar flow through a rigid isotropic granular (non consolidated) porous medium subjected to a external force field. Firstly we present the meaning of the many phisical terms ...

In this paper, we present numerical results for macroscopic quantities of interest (velocity profile, the heat ow profile and shear stress) for the ow of a binary mixture of rarefied gases in microchannels of arbitrary ...

Based on the articles Associativity of crossed produts by partial actions, enveloping actions and partial representations" of M. Dokuchaev and R. Exel ([7] and Enveloping Actions for Partial Hopf Actions" of M.M.S. Alves ...

The method discrete ordinates is used to solve problems involving rarefied gas dynamics. In this work, a version of the analytical method discrete ordinates (ADO) is used to solve problems in a semi-infinite. The complete ...

In this thesis we present a proof of the Malgrange-Ehrenpreis theorem, which states that every operator with constant coefficients non identically zero has a fundamental solution.

This work presents the Cauchy's theorem in its classical form, and aims to weaken their hypotheses, providing a more advantageous use in continuum mechanics. The methodology is axiomatic, that is, basic concepts are presented ...

In this work we studing a generalized predator-prey system in a spatial domain, in terms of formation. We show parameter, regions where transcritical, Hopf and Turing bifurcations appear are presented, and also some spatial ...

This work is designed to study helices and Bertrand curves. A circular helix is characterized by having constant curvature k 6= 0 and constant torsion t . If the ratio t k is constant, the curve is called generalized helix. ...

In this work we present the proof of a result due to Lars Hörmander which establishes a necessary condition for a linear operator with variable coefficients is globally resolvable.