f from x to y is continous at c iff f inverse v is open set in X for an open set v in Y | Theorem | Continuity of function

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f from x to y is continous at c iff f inverse v is open set in X for an open set v in Y pdf
f from x to y is continous at c iff f inverse v is open set in X for an open set v in Y handwritten notes
X and Y are metric spaces, f from x to y is continous at c iff f inverse v is open set in X for an open set v in Y.

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