(from Latin calculus
, literally "small pebble used for counting") is the mathematical study of change, in the same way that geometry is the study of shape and algebra is the study of operations and their application to solving equations. It has two major branches, differential
calculus (concerning rates of change and slopes of curves), and integral calculus (concerning accumulation
of quantities and the areas under and between curves); these two branches are related to each other by the fundamental theorem of calculus. Both branches make use of the fundamental notions of convergence
of infinite sequences and infinite series to a well-defined limit. Generally, modern calculus is considered to have been developed in the 17th century by Isaac Newton
and Gottfried Leibniz. Today, calculus has widespread uses in science, engineering and economics.
Calculus is a part of modern mathematics education. A course in calculus is a gateway
to other, more advanced courses in mathematics devoted to the study of functions and limits, broadly called mathematical analysis. Calculus has historically been called "the calculus of infinitesimals", or "infinitesimal calculus". Calculus
) is also used for naming some methods of calculation or theories of computation
, such as propositional calculus, calculus of variations, lambda calculus, and process calculus.