Many data are suitably modeled by functions consisting of straight-line segments. These functions may be called piecewise-linear. Smooth functions that are related to the hyperbola and that have ...

TOBIAS KAISER, PIECEWISE WEIERSTRASS PREPARATION AND DIVISION FOR O-MINIMAL HOLOMORPHIC FUNCTIONS, Proceedings of the American Mathematical Society, Vol. 145, No. 9 (September 2017), pp. 3887-3897 ...