Can I use the definition of continuity of function from Baby Rudin, setting X as empty set?(adsbygoogle = window.adsbygoogle || []).push({});

Rudin does not specify X is a non-empty set but he supposes p is in X.

Anyway if I use it for empty set X, then is a function with a domain E which is a subset of X continuous at p?

One more extra question: If a definition contains two statements that contradict each other in its hypotheses, what happens? (I know if a theorem contains these things, then the theorem becomes vacuously true.)

Note: for the Rudin's definition, please look at the attatched file.

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# Is every empty set function continuous?

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