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The Euler characteristic is stable under compact perturbations

Author: Calin-Grigore Ambrozie
Journal: Proc. Amer. Math. Soc. 124 (1996), 2041-2050
MSC (1991): Primary 47A53; Secondary 47A55
MathSciNet review: 1322909
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Abstract: We prove in the general case the stability under compact perturbations of the index (i.e. the Euler characteristic) of a Fredholm complex of Banach spaces. In particular, we obtain the corresponding stability property for Fredholm multioperators. These results are the consequence of a similar statement, concerning more general objects called Fredholm pairs.

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Calin-Grigore Ambrozie
Affiliation: Institute of Mathematics, Romanian Academy, P.O.Box 1-764 RO-70700 Bucharest, Romania

Keywords: Index, Fredholm complex of Banach spaces
Received by editor(s): December 21, 1994
Communicated by: Palle E. T. Jorgensen
Article copyright: © Copyright 1996 American Mathematical Society