Prove that (ℝ,τ_{√2})is T₀ but not T₁,T₂, , Regular , normal , where τ_{√2}={u∩√2:u∈τ}
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Originally Posted by blbl Prove that (ℝ,τ_{√2})is T₀ but not T₁,T₂, , Regular , normal , where τ_{√2}={u∩√2:u∈τ} What does this even mean? What is ?? Are you saying the only open set is ?
For that matter, what does it mean to intersect a set with a number?
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