Square-integrable function
FUNCTION WHOSE SQUARED ABSOLUTE VALUE HAS FINITE INTEGRAL
Square-integrable; Square integrable; Square integrable function; L2 space; L2 Space; L2-space; L2-function; L2-inner product; L^2; Quadratic integrability; Quadratically integrable; Square-summable function; Square integrability; Quadratically integrable function; L² space; Square-integrable functions; Square-integrability
In mathematics, a square-integrable function, also called a quadratically integrable function or L^2 function or square-summable function, is a real- or complex-valued measurable function for which the integral of the square of the absolute value is finite. Thus, square-integrability on the real line (-\infty,+\infty) is defined as follows.