👉 Continuity is a mathematical concept in calculus and topology that refers to the property of a function f(x) at any point x = a in its domain D, where the limit as x approaches a exists. This means that for every ε > 0 there exists δ > 0 such that if |f(x) - L| < ε whenever |x - a| < δ, then L is also in D. In other words, the function f(x) does not change its values at
