3) (i) Let X be a set containing elements a and b. Define T= {X, Ø, U| a E U and b E U}. This is a slight generalization of the particular point topology. Prove that this is a topology on X. (ii) Let X be a set containing at least three elements including a and b. Define T= {X, Ø, U| a E U or b E U}. Is this a topology on X? If so, prove it. If not, explain why not? (iii) Let X= {a, b}. Define T= {X, Ø, U] a E U or b E U}. topology on X? If so, prove it. If not, explain why not? Is this a

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Question

let x 

3) (i) Let X be a set containing elements a and b. Define T= {X, Ø,
U| a E U and b E U}. This is a slight generalization of the particular point
topology. Prove that this is a topology on X.
(ii) Let X be a set containing at least three elements including a and b.
Define T= {X, Ø, U\ a E U or b E U}. Is this a topology on X? If so,
prove it. If not, explain why not?
(iii) Let X= {a, b}. Define T= {X, Ø, U| a ¤ U or b E U}. Is this a
topology on X? If so, prove it. If not, explain why not?
Transcribed Image Text:3) (i) Let X be a set containing elements a and b. Define T= {X, Ø, U| a E U and b E U}. This is a slight generalization of the particular point topology. Prove that this is a topology on X. (ii) Let X be a set containing at least three elements including a and b. Define T= {X, Ø, U\ a E U or b E U}. Is this a topology on X? If so, prove it. If not, explain why not? (iii) Let X= {a, b}. Define T= {X, Ø, U| a ¤ U or b E U}. Is this a topology on X? If so, prove it. If not, explain why not?
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