We study the Galois symbol map associated to multiplicative group and an abelian variety which has good ordinary reduction over a $p$-adic field. As byproduct, one can calculate “class group” in sense of class field theory for curves ove

to evaluate the effect of drought stress, biofertilizer and chemical phosphorus fertilizer on yield and seed protein percentage of two lentil cultivars, an experiment was conducted in split factorial based on crbd design with 4 replications in research farm of university of tehran (karaj-iran) during 2009-10. the main factor including three irrigation levels (irrigation after 70, 90 and 130 mm ...

This paper theoretically compares the performance of simulated annealing and evolutionary algorithms. Our main result is that under mild conditions a wide variety of evolutionary algorithms can be shown to have greater probability of success than simulated annealing after a suuciently large number of function evaluations. This class of EAs includes variants of evolution strategies and evolution...

A fundamental problem in classifying varieties is to determine natural subsets whose moduli is bounded. The difficulty of this problem is partially measured by the behaviour of the canonical class of the variety. Three extreme cases are especially of interest: either the canonical class is ample, that is the variety is of general type, or the canonical class is trivial, for example the variety ...

We introduce a class extending the notion of Chern-Mather class to possibly nonreduced schemes, and use it to express the di erence between SchwartzMacPherson's Chern class and the class of the virtual tangent bundle of a singular hypersurface of a nonsingular variety. Applications include constraints on the possible singularities of a hypersurface and on contacts of nonsingular hypersurfaces, ...

This paper provides an explanation of the increasing complexity of corporate IT management as a special case of application of the law of requisite variety. Frequently cited drawback of established frameworks of IT best practices like COBIT and ITIL is their complexity and related difficulty in their implementation. Through the perspective of the law of requisite variety, drawn from the field o...

Anual, inicialmente, a revista passou a ser semestral a partir do volume 20 (2006), de forma que, a cada ano, se publicam dois números. Foi modificado o formato da Revista aumentando o seu tamanho, o que permitiu melhorar a qualidade das imagens, tão importante nas publicações dedicadas à arqueologia e ao patrimônio arqueológico, utilizando-se também a policromia. Essas melhorias técnicas deram...

Anual, inicialmente, a revista passou a ser semestral a partir do volume 20 (2006), de forma que, a cada ano, se publicam dois números. Foi modificado o formato da Revista aumentando o seu tamanho, o que permitiu melhorar a qualidade das imagens, tão importante nas publicações dedicadas à arqueologia e ao patrimônio arqueológico, utilizando-se também a policromia. Essas melhorias técnicas deram...