Exercise 3 1) Assume that X is a Hausdorff space. If D C X is a dense subset of X. If the point x D is an isolated point in D for the induced topology on the subset DC X, show that r is also an isolated point in X.

Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
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Chapter4: Vector Spaces
Section4.2: Vector Spaces
Problem 38E: Determine whether the set R2 with the operations (x1,y1)+(x2,y2)=(x1x2,y1y2) and c(x1,y1)=(cx1,cy1)...
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Exercise 3 Part 1
Exercise 3
1) Assume that X is a Hausdorff space. If D C X is a dense subset of X. If
the point xD is an isolated point in D for the induced topology on the subset D C X, show that
x is also an isolated point in X.
Transcribed Image Text:Exercise 3 1) Assume that X is a Hausdorff space. If D C X is a dense subset of X. If the point xD is an isolated point in D for the induced topology on the subset D C X, show that x is also an isolated point in X.
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