Definition:Piecewise Continuously Differentiable Function

Definition
Let $f$ be a real function defined on a closed interval $\left[{a \,.\,.\, b}\right]$.

Equivalence of Definitions
Definition 2 is Equivalent to Definition 1.

Also defined as
Other definitions of Piecewise Continuously Differentiable Function exist. Some examples are shown in the list below. The list is condensed; see the discussion page for a detailed description.

- $(2)$ is replaced by: $f$ is continuously differentiable on the intervals ($x_{i−1} \,.\,.\, x_i$).

- $(1)$ is replaced by: $f$ is piecewise continuous, and $(2)$ is replaced by: - The codomain of $f$ is $\C$ instead of $\R$.
 * $f$ is continuously differentiable on the intervals ($x_{i−1} \,.\,.\, x_i$) and $f′$ has one-sided limit(s) at every $x_i$, or
 * $f$ is continuously differentiable on the intervals ($x_{i−1} \,.\,.\, x_i$) and $f′$ has one-sided limit(s) at every $x_i$, and, in addition, $f$ is allowed to be undefined at the points $x_i$, or
 * $f$ is continuously differentiable on the intervals ($x_{i−1} \,.\,.\, x_i$), and $f′$ is bounded on ($x_{i−1} \,.\,.\, x_i$).