We study representations of piecewise-smooth signals on graphs. We first define classes for smooth, piecewise-constant, and piecewise-smooth graph signals, followed by a series of multiresolution ...

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 ...

Here, we consider approximating functions of several variables in a similar piecewise linear manner. We focus on the nontrivial part of this technique, which is that of choosing the appropriate ...

In this problem, the optimal path is one that maximizes the expected utility, with the utility function being piecewise-linear and concave. Such a utility function can be used to approximate nonlinear ...

It estimates the coefficient values based on a custom piecewise likelihood function that accounts for the censoring and truncation of the data generating process for Safegraph patterns data. This is ...

Wendland, H. Piecewise polynomial, positive definite and compactly supported radial functions of minimal degree. Advances in Computational Mathematics 1995;4389-396.