Newton’s calculus is based on linear functions (straight lines), whereas Non-Newtonian Calculus, created by Robert Katz and Jane’s husband Michael Grossman, is based on non-linear functions.

Subtitles have been added (automatic translations in cc settings). Scientists applying the Geometric Calculus renamed this calculus “Multiplicative Calculus”, a misnomer. The reason is there are many other multiplicative calculi.

https://sites.google.com/site/pianoandmathtutorials/non-newtonian-calculus