He is best known for his work on the theory of equations, algebraic analysis, plain and spherical trigonometry, analytical geometry, and differential calculus.
en.wikipedia.org The primary objects of study in differential calculus are the derivative of a function, related notions such as the differential, and their applications.
en.wikipedia.org During her studies, she took every mathematics course offered, including spherical trigonometry, differential calculus, projective geometry, partial differential equations, and statistics.
en.wikipedia.org Under this assumption, marginal concepts, including marginal utility, may be expressed in terms of differential calculus.
en.wikipedia.org Only in the 18th century was the theorem interpreted as a fundamental result in differential calculus.
en.wikipedia.org