10. Here is a theorem about compactly generated spaces. We say that f: X --→ Y is a proper map if for each compact set Din Y, the set f-"(D) is compact in X. Theorem. Let X be a space; let Y be a compactly generated Hausdorff space, ISS:X → Y is continuous, injective, and proper, then f is an imbedding and f(X) is closed in Y.
10. Here is a theorem about compactly generated spaces. We say that f: X --→ Y is a proper map if for each compact set Din Y, the set f-"(D) is compact in X. Theorem. Let X be a space; let Y be a compactly generated Hausdorff space, ISS:X → Y is continuous, injective, and proper, then f is an imbedding and f(X) is closed in Y.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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