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Displaying 161 – 180 of 183

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The structure of a local embedding and Chern classes of weighted blow-ups

Anca M. Mustaţǎ, Andrei Mustaţǎ (2012)

Journal of the European Mathematical Society

For a proper local embedding between two Deligne-Mumford stacks Y and X , we find, under certain mild conditions, a new (possibly non-separated) Deligne-Mumford stack X ' , with an etale, surjective and universally closed map to the target X , and whose fiber product with the image of the local embedding is a finite union of stacks with corresponding etale, surjective and universally closed maps to Y . Moreover, a natural set of weights on the substacks of X ' allows the construction of a universally closed...

The tautological ring of M 1 , n c t

Mehdi Tavakol (2011)

Annales de l’institut Fourier

We describe the tautological ring of the moduli space of stable n -pointed curves of genus one of compact type. It is proven that it is a Gorenstein algebra.

Un théorème de zéros dans les groupes algébriques commutatifs

Aurélien Galateau (2014)

Publications mathématiques de Besançon

Dans ces notes, on présente un théorème de zéros, dû à Amoroso et David, qui généralise le résultat principal de [Phi96] et constitue une version avec multiplicités, dans le cadre élargi des groupes algébriques commutatifs, du lemme de zéros de [AD03]. Cet énoncé s’avère utile dans certaines approches diophantiennes du problème de Bogomolov effectif sur les variétés abéliennes (cf. [Gal10]).

[unknown]

Lionel Darondeau (0)

Annales de l’institut Fourier

Currently displaying 161 – 180 of 183