Smooth vs. Non-smooth Functions

Smooth functions have a unique defined first derivative (slope or gradient) at every point. Graphically, a smooth function of a single variable can be plotted as a single

What is a non-smooth function? - Quora

Nonsmooth function and its smooth Legendre conjugate.

Non-analytic smooth function - Wikipedia

Full article: New Smoothing Approximations to Piecewise Smooth

Starting LINGO on Windows

3.2 Smooth and Strongly Convex Functions

Module 5: Nonlinear & Non-smooth Models

PPT - Smooth Muscle PowerPoint Presentation, free download - ID

Is circle a smooth curve?