The genus Clarkus with a redescription of sheri females is recorded and illustrated for the first time in Vietnam. Eight were collected from several natural reserves: Bac Me (Ha Giang province), Van Ban (Lao Cai Vu Quang Tinh Kon Chu Rang (Gia Lai province) Linh (Vinh Phuc province). Their measurements features corresponded well type population California, USA other populations South Africa, Me...

Matrices coming from elliptic Partial Differential Equations (PDEs) have been shown to have a low-rank property: well defined off-diagonal blocks of their Schur complements can be approximated by low-rank products. Given a suitable ordering of the matrix which gives to the blocks a geometrical meaning, such approximations can be computed using an SVD or a rank-revealing QR factorization. The re...

RÉSUMÉ. Dans le cadre des transmissions à antennes multiples, on étudie la construction d’un précodeur linéaire unitaire ayant un déterminant non nul et vérifiant les conditions du génie. Un tel précodeur sera optimisé à la fois pour le décodage à maximum de vraisemblance et pour le décodage probabiliste itératif. En combinant le critère du rang et les conditions du génie, on obtient une nouvel...

We extend our previous analysis of the classical integrable models of Calogero in several respects. Firstly we provide the algebraic resaons of their quantum integrability.Secondly we show why these systems allow their initial value problem to be solved in closed form. Furthermore we show that due to their similarity with the above models the classical and quantum Heisenberg magnets with long r...

A few years ago, I attended for the first time a performance of Mozart's opera, The Magic Flute. The electrifying moment came when the Queen of the Night launched into her aria. I sat bolt-upright on the edge of the seat, and must have held my breath for the entire duration. My heart ached and tears welled up in my eyes. Her voice rang through me everywhere as though I had dematerialized into a...

Je ne parlerai que d’une ligne de bus qui passe par ma « ville » de Roquevaire où coule le fleuve qui se jette dans la mer à Marseille. Marseille est à côté de Roquevaire depuis que le clavier personnel de Pierre Cochereau est arrivé dans l’église de Roquevaire. Avant, Roquevaire se trouvait à côté de Marseille. Le festival d’orgue international est bien présent et grandit. Naturellement, certa...