We study the poset of Borel congruence classes of symmetric matrices ordered by containment of closures. We give a combinatorial description of this poset and calculate its rank function. We discuss the relation between this poset and the Bruhat poset of involutions of the symmetric group. Also we present the poset of Borel congruence classes of anti-symmetric matrices ordered by containment of...

Abstract The cofinality quantifiers were introduced by Shelah as an example of a compact logic stronger than first-order logic. We show that the classes models axiomatized these can be turned into Elementary Class restricting to positive and deliberate uses. Rather using ad hoc proof, we give general framework abstract Skolemizations. This method gives uniform proof wide rang are Classes.

The Homeland War in Croatia was still far from conclusion when, one day, the phone rang in the office of one of us (SV-P). “I heard you could help me obtain a DNA sequencer,” the voice on the other side said. “We need it to identify the victims from mass graves in Bosnia.” Unfortunately, the help was no more than providing a few connections that later proved useful. At the time, we did not even...

RESUME. Cet article décrit quelques approches afin d'extraire les termes les plus représentatifs d'un site web ou d'un ensemble de documents en comparaison avec d'autres sites ou un corpus de référence. Nous montrons que la fréquence d'occurrence ou le rang des termes les plus fréquents peut fournir une première synthèse. Notre proposition s'appuie sur une distribution binomiale des mots et le ...

a two-year laboratory study on the biology (including self-fertilization) of bulinus truncatus, the intermediate host of schistosoma haematobium, s. bovis and paramphistomum microbotrium in iran, has revealed information on the longevity, reproduction, hatchability rate, hatching time during various months of the year, and growth and mortality rates of this snail. it was found that the reproduc...