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- Centre National de la Recherche ScientifiqueFR575 papers
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6 papers · 1 filter
Two-dimensional Artin groups with CAT(0) dimension three
Noel Brady, John Crisp
We exhibit 3-generator Artin groups which have finite 2-dimensional Eilenberg-Mac Lane spaces, but which do not act properly discontinuously by semi-simple isometries on a 2-dimens…
Vassiliev invariants for braids on surfaces
Juan Gonzalez-Meneses, Luis Paris
We show that Vassiliev invariants separate braids on a closed oriented surface, and we exhibit an universal Vassiliev invariant for these braids in terms of chord diagrams labeled…
Background discrimination capabilities of a heat and ionization germanium cryogenic detector
P. Di Stefano, L. Berge, B. Chambon +26
The discrimination capabilities of a 70 g heat and ionization Ge bolometer are studied. This first prototype has been used by the EDELWEISS Dark Matter experiment, installed in the…
The solution to a conjecture of Tits on the subgroup generated by the squares of the generators of an Artin group
John Crisp, Luis Paris
It was conjectured by Tits that the only relations amongst the squares of the standard generators of an Artin group are the obvious ones, namely that a^2 and b^2 commute if ab=ba a…
Event categories in the EDELWEISS WIMP search experiment
A. Benoit, L. Berge, A. Broniatowski +28
Four categories of events have been identified in the EDELWEISS-I dark matter experiment using germanium cryogenic detectors measuring simultaneously charge and heat signals. These…
Redundant Picard-Fuchs system for Abelian integrals
D. Novikov, S. Yakovenko
We derive an explicit system of Picard-Fuchs differential equations satisfied by Abelian integrals of monomial forms and majorize its coefficients. A peculiar feature of this const…