Differential calculus and Infinitesimal calculus

Differential calculus noun - The part of calculus that deals with the variation of a function with respect to changes in the independent variable (or variables) by means of the concepts of derivative and differential.

Infinitesimal calculus and differential calculus are semantically related. In some cases you can use "Infinitesimal calculus" instead a noun phrase "Differential calculus".

Infinitesimal calculus noun - The branch of mathematics that is concerned with limits and with the differentiation and integration of functions.

Differential calculus and infinitesimal calculus are semantically related. Sometimes you can replace phrase "Differential calculus" with "Infinitesimal calculus", this phrases are similar.