Titlebook: Natural Function Algebras; Charles E. Rickart Textbook 1979 Springer-Verlag New York Inc. 1979 Funktionenalgebra.Lemma.Natural.Vector spac

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,Holomorphic Extensions of Δ-Domains, provided .ρ = [.]., and we write . using the “closed” arrow “=>“in place of the “open” arrow “=>“in order to distinguish the germ-valued from the complex-valued case. Maximal extensions and maximal A-domains for germ-valued functions may be defined exactly as in the case of complex-valued functions.