The goal of this work is to construct, for a smooth variety X over a perfect field k of finite characteristic, an overconvergent de Rham-Witt complex W ΩX/k as a suitable subcomplex of the de RhamWitt complex of Deligne-Illusie. This complex, which is functorial in X, is a complex of étale sheaves and a differential graded algebra over the ring W (OX) of overconvergent Witt-vectors. If X is aff...

Résumé. — On a montré dans un précédent travail que le complexe bar n-itéré usuel des algèbres commutatives s’étend aux En-algèbres et détermine l’homologie naturelle associée à cette catégorie d’algèbres. On montre dans cet article que le complexe bar n-itéré d’une En-algèbre forme un diagramme sur un remplacement cofibrant de la catégorie des arbres élagués à n niveaux – une variante de la ca...

THEMES : formes différentielles, champs de vecteurs, coordonnées complexes z et z, lemme de Poincaré, formule de Green-Riemann. Sources : Amar-Matheron [Analyse complexe] (Cassini), Berenstein-Gay [Complex variables] (GTM 125, Springer), Hénaut-Yger [Éléments de Géométrie] (Ellipses), Yger [Analyse complexe et distributions](Ellipses), Marco & al [Mathématiques L2] (Pearson Education). NOTA. Le...

A recurring challenge to ion microprobe U^Pb zircon geochronology has been to discriminate between preservation of original igneous zircon populations and inherited grains. This has proved particularly problematic in studying the polyphase metamorphic rocks that dominate Early Archean gneissic terranes. For example, differing interpretations exist for the origin of complex zircon populations in...

This paper is an outgrowth of the compilation of metamorphic information for the Canadian Shield in Ontario, and complements the recently compiled Metamorphic Map of the Canadian Shield. The paper contains a summary of the Archean metamorphic history of the Superior Province in Ontario on a subprovince basis, with an emphasis on the limitations of the existing data and the reasoning applied in ...

Abstract: Metamorphic viruses modify their code to produce viral copies that are syntactically different from their parents. The viral copies have the same functionality as the parent but typically have no common signature. This makes signature-based virus scanners ineffective for detecting metamorphic viruses. But machine learning tool such as Hidden Markov Models (HMMs) have proven effective ...

The conditions at which monazite and allanite were produced and destroyed during prograde metamorphism of pelitic rocks were determined in a Buchan and a Barrovian regional terrain and in a contact aureole, all from northern New England, USA. Pelites from the chlorite zone of each area contain monazite that has an inclusion-free core surrounded by a highly irregular, inclusion-rich rim. Texture...

An article presents a new technique for metamorphic viruses detection using modified emulators, placed in the hosts of the network. Proposed technique provides the classification of the metamorphic virus in classes with the usage of the fuzzy logic. Technique makes it possible to detect the metamorphic viruses, which use obfuscation techniques. The results of experimental studies showed the eff...