Definition:Triangle Wave/Graph

Definition
Let $T$ be the triangle wave defined as:


 * $\forall x \in \R: \map T x = \begin {cases}

\size x & : x \in \closedint {-\lambda} \lambda \\ \map T {x + 2 \lambda} & : x < -\lambda \\ \map T {x - 2 \lambda} & : x > +\lambda \end {cases}$

The graph of $T$ is given below:


 * Triangle-wave.png