Main Page | See live article | Alphabetical index In mathematical analysis, a real- or complex-valued function of a real variable is square-integrable on an interval if the integral over that interval of the square of its absolute value is finite. The set of all measurable functions that are square-integrable forms a Hilbert space, the so-called Lp space This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.