Invertibility and Fredholm Property of Fock Toeplitz Operators

Autor: Chunxu Xu, Tao Yu
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Mathematics, Vol 11, Iss 13, p 2976 (2023)
Druh dokumentu: article
ISSN: 2227-7390
DOI: 10.3390/math11132976
Popis: We characterize some necessary and sufficient conditions of invertible Toeplitz operators acting on the Fock space. In particular, we study the Fredholm properties of Toeplitz operators with BMO1 symbols, where their Berezin transforms are bounded functions of vanishing oscillation. We show the Fredholm index of the Toeplitz operator via the winding of its Berezin transform along a sufficiently large circle and provide a characterization of invertible Toeplitz operators with non-negative symbols, possibly unbounded, such that the Berezin transforms of the symbols are bounded and of vanishing oscillation.
Databáze: Directory of Open Access Journals
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