Abstract
Let f be a mapping from a set E to a set E′. If A is a subset of E we use the notation f→(A) for the direct image of the subset A under f, i.e. the set consisting of the images f(a) of all points a in A. Again, if A′ is a subset of E′, we use f←(A′) to denote the inverse image of A′ under f, i.e. the set of all points x of E for which the image f(x) lies in A′.
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© 1996 Springer Science+Business Media New York
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Adamson, I.T. (1996). Mappings of Topological Spaces. In: A General Topology Workbook. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-0-8176-8126-5_2
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DOI: https://doi.org/10.1007/978-0-8176-8126-5_2
Publisher Name: Birkhäuser, Boston, MA
Print ISBN: 978-0-8176-3844-3
Online ISBN: 978-0-8176-8126-5
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