| We give a new proof that all external rays of the Man-delbrot set at rational angles land, and of the relation between the external angle of such a ray and the dynamics at the landing point. Our proof is diierent from the original one, given by Douady and Hubbard and reened by Lavaurs, in several ways: it replaces analytic arguments by combinatorial ones; it does not use complex analytic depe...

Les fibromes uterins sont des tumeurs cellules musculaires lisses il sagit gynecologiques benignes les plus courantes chez femmes en age de procreer. Leur presence est souvent constatee dans le cadre lexploration qui menee un couple aux prises avec linfertilite par ailleurs, ces dorigine monoclonale. Il rare constater avant lapparition premières règles plus, connaissent habituellement une reg...

Many present-day microprocessors have ne grain parallelism, be it in the form of a pipeline, of multiple functional units, or replicated processors. The eecient use of such architectures depends on the capability of the compiler to schedule the execution of the object code in such a way that most of the available hardware is in use while avoiding so-called dependences. In the case of one simple...

Pour une matrice polynomiale P(x) de degr e d dans Mn;n(Kx]), o u K est un corps commutatif, une r eduction a la forme normale d'Hermite peut ^ etre calcul ee en O ~ (M(nd)) op erations arithm etiques, si M(n) est le co^ ut du produit de deux matrices n n sur K. De plus, une telle r eduction peut ^ etre obtenue en temps parall ele O(log +1 (nd)) en utilisant O(L(nd)) processeurs, si le probl em...

Programs and systems of recurrence equations may be represented as sets of actions which are to be executed subject to precedence constraints. In many cases, actions may be labelled by integral vectors in some iteration domain, and precedence constraints may be described by aane relations. A schedule for such a program is a function which assigns an execution date to each action. Knowledge of s...

L'analyse chimique est un auxiliaire essentie1 de la recherche biochimique. Depuis quelques annees, de nouvelles techniques d'analyse telles que l'emploi des traceurs radioactifs, I'echange d'ions et la chromatographie donnent de bons resultats. L'analyse par radioactivation deja appliquee avec succes-e-quoique de maniere assez restreinte-en biochimie humaine et animale, est probablement appele...

This papers describes a parametrized distributed algorithm applicable to any directed graph topology. The function parameter of our algorithm is instantiated to produce distributed algorithms for both fundamental and high level applications, such as shortest path calculus and depth-rst-search tree construction. Due to fault resilience properties of our algorithm, the resulting protocols are sel...