Some formulas representing the Chern-Euler class of circle bundle over a closed surface in terms of global singularities of restrictions of a generic function to the fibers are given. These formulas ...
On étend la technique qui a permis à A. Walfisz d'établir (en 1962) l'estimation H(x) ≪ (logx)⅔(log log x)4/3 pour le terme d'erreur lié à la fonction d ...
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