HARTMANN, Andreas; ORSONI, Marcu-Antone

doi:10.1016/j.matpur.2021.04.009

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HARTMANN, Andreas
Institut de Mathématiques de Bordeaux [IMB]

ORSONI, Marcu-Antone
Institut de Mathématiques de Bordeaux [IMB]

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Ce document a été publié dans

Journal de Mathématiques Pures et Appliquées. 2021, vol. 150, p. 181-201

Elsevier

Résumé en anglais

In this paper, we solve a separation of singularities problem in the Bergman space. More precisely, we show that if $P\subset \mathbb{C}$ is a convex polygon which is the intersection of $n$ half planes, then the Bergman space on $P$ decomposes into the sum of the Bergman spaces on these half planes. The result applies to the characterization of the reachable space of the one-dimensional heat equation on a finite interval with boundary controls. We prove that this space is a Bergman space of the square which has the given interval as a diagonal. This gives an affirmative answer to a conjecture raised in [HKT20].< Réduire