Homework Statement
Suppose that the function f is defined only on the integers. Explain why it is continuous.
Homework Equations
The ε/δ definition of continuity at a point c:
for all ε > 0, there exists a δ > 0 such that |f(x) - f(c)| ≤ ε whenever |x - c| ≤ δ
The Attempt at a...