Abstract
We give an example of a continuous bijective mapping with a discontinuous inverse which acts in a separable Banach space and differs from the identical mapping only in an open unit ball. A criterion for Banach manifolds with a separable model to be finite-dimensional is established in terms of the continuity of inverse operators.
References
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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 46, No. 8, pp. 1099–1103, August, 1994.
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Savkin, V.I. A criterion for Banach manifolds with a separable model to be finite-dimensional. Ukr Math J 46, 1210–1214 (1994). https://doi.org/10.1007/BF01056184
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DOI: https://doi.org/10.1007/BF01056184