Abstract
Let (A i ) i єI be a family of sets and let U be an ultrafilter on I. By \(\mathop \prod \limits_{i \in I}\) A i we mean the cartesian product of the sets (A i ) i єI; consider the relation ~ u on \(\mathop \prod \limits_{i \in I}\) A i defined by:
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© 1990 Springer-Verlag New York Inc.
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Aksoy, A.G., Khamsi, M.A. (1990). Chapter 2. In: Nonstandard Methods in Fixed Point Theory. Universitext. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3444-9_3
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DOI: https://doi.org/10.1007/978-1-4612-3444-9_3
Publisher Name: Springer, New York, NY
Print ISBN: 978-0-387-97364-7
Online ISBN: 978-1-4612-3444-9
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