© 1980 by London Mathematical Society
Maximality in Function Algebras
Instituut voor Propedeutische Wiskunde, Universiteit van Amsterdam Roetersstraat 15, 1018 WB Amsterdam, The Netherlands
A function algebra A on a compact hausdorff space X is called maximal in a function algebra B on X if A
B and if for any function algebra C on X with A
C
B, either C = A or else C = B. The situation for which the maximal ideal space of B can be regarded as a proper subset of the maximal ideal space of A will be considered. A large subclass consists of algebras A and B where B is gotten from A by adjoining to A functions which, in a certain way, depend analytically on elements of A. This exploits an idea of
irka on joint spectra of elements of a function algebra.