Exercise 1. 1) Suppose the topological space X is the union of the finite family F₁,..., Fm of closed subsets of X. If f: X→Y is a map from X to the topological space Y, show that f: X→Y is continuous if and only if each restriction f|F₁: F₁ →Y, i = 1,...,m, is continuous. 2) If we assume that X = UiENFi, with each F₁ a closed subset of the topological space X, and f: X → Y is a map such that every restriction fF; : F; → Y, i € N, is continuous, does it follow that f is automatically continuous? [If true prove it, if false give an example]
Exercise 1. 1) Suppose the topological space X is the union of the finite family F₁,..., Fm of closed subsets of X. If f: X→Y is a map from X to the topological space Y, show that f: X→Y is continuous if and only if each restriction f|F₁: F₁ →Y, i = 1,...,m, is continuous. 2) If we assume that X = UiENFi, with each F₁ a closed subset of the topological space X, and f: X → Y is a map such that every restriction fF; : F; → Y, i € N, is continuous, does it follow that f is automatically continuous? [If true prove it, if false give an example]
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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