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# Vector-valued holomorphic functions in several variables

Publikationstyp

Journal Article

Publikationsdatum

2020

Sprache

English

Author

Kruse, Karsten

Institut

TORE-URI

Enthalten in

Volume

63

Issue

2

Start Page

247

End Page

275

Citation

Functiones et Approximatio Commentarii Mathematici 63 (2): 247-275 (2020)

Publisher DOI

Scopus ID

ArXiv ID

Publisher

Adam Mickiewicz University, Faculty of Mathematics and Computer Science

In the present paper we give some explicit proofs for folklore theorems on holomorphic functions in several variables with values in a locally complete locally convex Hausdorff space E over C. Most of the literature on vector-valued holomorphic functions is either devoted to the case of one variable or to infinitely many variables whereas the case of (finitely many) several variables is only touched or is subject to stronger restrictions on the completeness of E like sequential completeness. The main tool we use is Cauchy's integral formula for derivatives for an E-valued holomorphic function in several variables which we derive via Pettis-integration. This allows us to generalise the known integral formula, where usually a Riemann-integral is used, from sequentially complete E to locally complete E. Among the classical theorems for holomorphic functions in several variables with values in a locally complete space E we prove are the identity theorem, Liouville's theorem, Riemann's removable singularities theorem and the density of the polynomials in the E-valued polydisc algebra.