[[Continuity]]
# Left and right continuity
A function $f$ is said to be **right-continuous** iff.
$$
\begin{align*}
\lim_{ \delta \to 0^+ }f(t + \delta) = f(t) 
\end{align*}
$$
and likewise **left-continuous** iff.
$$
\begin{align*}
\lim_{ \delta \to 0^+ }f(t - \delta) = f(t) 
\end{align*}
$$


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