Continuous

[OldChuang (老莊)]

Def: f(x) is continuous at x belonging to I if

given any epsilon e > 0, exist delta d=d(e) ,only depending on e,

such that |f(x) - f(y)| < e provided |x-y| < d.

If for all x belonging to I , f(x) is continuous at x.

Then we call f(x) is continuous function on I.

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