# Lebesgue integral

## Lebesgue integral

[lə′beg ‚int·ə·grəl]
(mathematics)
The generalization of Riemann integration of real valued functions, which allows for integration over more complicated sets, existence of the integral even though the function has many points of discontinuity, and convergence properties which are not valid for Riemann integrals.
References in periodicals archive ?
The book covers the set of real numbers, elementary point-set topology, sequences and series of real numbers, limits and continuity, differentiation, the Riemann integral, sequences and series of functions, functions of several real variables, the Lebesgue integral, and many other related subjects over nine chapters.
He takes a stab at it, relying heavily on the Lebesgue integral.
Nevertheless, a proof using a basic property of the Lebesgue integral (integral of a nonnegative-valued function is nonnegative) may be facilitated by the fact, that an infinite cone C is the intersection of all half-spaces containing it, C = [intersection] {H : H [contains] C}, where by a half space H we mean
t] and such that the Lebesgue integral [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] along sample paths is a.
An important consequence is that an integral over G can be defined, with properties very like the usual or Lebesgue integral.
DELTA]] is called [DELTA]-measurable, and the Lebesgue integral over [a, b[).
They cover measure spaces, the Lebesgue integral, differentiation and integration, the classical Banach spaces, and extensions of additive set functions to measures.
Hubbard (Cornell University) introduces matrices for solving systems of linear equations and approximating nonlinear ones, defines smooth manifolds, discusses Riemann and Lebesgue integrals, computes the volume of manifolds, and uses differential forms to justify the generalized Stokes's theorem.

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