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  3. let r be the real line with the euclidean topology

Let R be the real line with the Euclidean topology. (a) Prove that R has a...

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Advance Math

Let R be the real line with the Euclidean topology.

(a) Prove that R has a countable base for its topology.

(b) Prove that every open cover of R has a countablesubcover.

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