# Partial-differential

**noun**, Mathematics.

1.

an expression obtained from a given function of several variables by taking the partial derivative with respect to one of the variables and multiplying by the increment in that variable.

Tagged: p

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- Partial-differential-equation
noun, Mathematics. 1. a differential equation containing partial derivatives.

- Partial-differentiation
noun, Mathematics. 1. the process of finding one of the partial derivatives of a function of several variables.

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noun 1. an eclipse, esp of the sun, in which the body is only partially hidden Compare total eclipse, annular eclipse partial eclipse An eclipse in which the part of the surface of a celestial object is obscured. See more at eclipse.

- Partial equivalence relation
(PER) A relation R on a set S where R is symmetric (x R y => y R x) and transitive (x R y R z => x R z) and where there may exist elements in S for which the relation is not defined. A PER is an equivalence relation on the subset for […]