Plasmataco Plasmataco

21-11-2017
Mathematics

contestada

Is R-Z(Real numbers - integers) an open topology?

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SecretStupid SecretStupid

28-11-2017

R−Z is a union of countable many open sets so R−ZR−Z is open
I actually didn't know that I had to look it up and got my answer from another site, oppsie doopsies

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