| | [No title] (Site not responding. Last check: 2007-10-21) |
 | | In the mathematical branch of real analysis, Lebesgue integration is a framework for extending the notion of integral as the area under the curve to a large class of functions whose domain may not even be in R. |
 | | The Lebesgue approach is not the most elementary area-based integration theory; that distinction goes to the Riemann integral. |
 | | Every reasonable notion of integral needs to be linear and monotone, and the Lebesgue integral is: if f and g are integrable functions and a and b are real numbers, then af + bg is integrable and ∫(af + bg) = a∫f + b∫g; if f ≤ g, then ∫f ≤ ∫g. |
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