Question

definition of usually topology with example? ​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

A topology on the real line is given by the collection of intervals of the form (a, b) along with arbitrary unions of such intervals. Let I = {(a, b) | a, b ∈ R}. Then the sets X = R and T = {∪αIα | Iα ∈ I} is a topological space. This is R under the “usual topology.” Example.Apr 4, 2014