On one generalization of skew tent maps

We generalize in this work the properties of the conjugacy of skew tent maps. It is known that the conjugacy $h$ from a skew tent map $g_1$ to $g_2$ is differentiable at a point $x^*$ if and only if there exists left and right limits $\lim\limits_{n\rightarrow \infty}h_n'(x^*-)$ and $\lim\limits_{n\rightarrow \infty}h_n'(x^*+)$, where $h_n$ is a piecewise linear function, which coincides with $h$ at $g_1^{-n}(0)$, and all whose kinks belong to $g_1^{-n}(0)$. The attempts to generalize this result to some reacher class of unimodal maps is natural. For this reason we introduce the class of piecewise linear maps, all whose kinks are in the complete pre-image of $0$ and study the relation of the differential properties of their conjugacy with ones of the mentioned approximation~$(h_n)_{n\geq 1}$.