Les formes minima des surfaces d'Ossian Bonnet

Formes D’onde Transversales De Maslov Dans Les Argiles Fortement Anisotropes Et Implications Dans Les Analyses De Biréfringence Des Ondes Transversales

Les argiles sont les roches sédimentaires les plus répandues dans l’environnement des hydrocarbures, et forment souvent la roche mère et la roche des pièges pétrolifères. En raison de la structure en plaques des grains, les argiles sont généralement anisotropes. Dans le présent article, nous calculons les formes d’onde sismiques pour des argiles fortement anisotropes en employant la théorie asy...

Residus de 2-formes differentielles sur les surfaces algebriques et applications aux codes correcteurs d'erreurs

The theory of algebraic-geometric codes has been developed in the beginning of the 80's after a paper of V.D. Goppa. Given a smooth projective algebraic curve X over a finite field, there are two different constructions of error-correcting codes. The first one, called"functional", uses some rational functions on X and the second one, called"differential", involves some rational 1-forms on this ...

Traitement d’images multivariées avec l’arbre des formes

Résumé The Tree of Shapes (ToS) is a morphological tree that provides an high-level hierarchical, self-dual and contrast invariant representation of the image suitable for many image processing tasks.When dealing with color images, one cannot use the Tree of Shapes because its definition is ill-formed on multivariate data. Common workarounds such as marginal processing, or imposing a total orde...

Les maladies des animaux dues à des Clostridium welchii

Schlesinger Transformations for Bonnet Surfaces

Bonnet surfaces, i.e. surfaces in Euclidean 3-space, which admits a one-parameter family of isometries preserving the mean curvature function, can be described in terms of solutions of some special Painlev e equations. The goal of this work is to use the well-known Schlesinger transformations for solutions of Painlev e VI equations to create new Bonnet surfaces from a known one.