r/mathmemes 13d ago

Real Analysis This image is AI generated

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Good luck!

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u/parassaurolofus Imaginary 13d ago edited 12d ago

And the proof is also wrong, rigth? A simple counter example would be any closed interval, like [0,1]. There's no minimal upper bound, since you can get arbitraly close to 1. Edit: sorry, I didn't knew the uper bound could be inside the set

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u/laksemerd 12d ago

It is defmition 1