Mathematics Research Institute

Seminario de Doctorado
Seminario de Doctorado

The inyectivity of Borel map in Mandelbrojt Domains

Ignacio Miguel Cantero (Universidad de Valladolid)

Fecha: 04/09/2020 09:30
Lugar: Presentación virtual webex

A Mandelbrojt region is a (not necessarily sectorial) connected open set $D$ in the Riemann surface of the logarithm with 0 in its boundary, symmetric with respect to a direction and with a positive opening (in a precise sense). In 1952, S. Mandelbrojt gave a characterization of the injectivity of the asymptotic Borel mapping for the class of functions admitting uniform $\mathbb{M}$-asymptotic expansion in these domains, where the control of the remainders is specified in terms of a given weight sequence $\mathbb{M}$ of positive real numbers. We hope to extend this criterion to the Carleman-Roumieu ultraholomorphic class in $D$ consisting of the holomorphic functions with uniformly bounded derivatives in terms of the sequence $\mathbb{M}$.