= Lebesgue integral
{c}
{wiki=Lebesgue_integration}
"More complex and general" integral. Matches the <Riemann integral> for "simple functions", but also <Lebesgue integral vs Riemann integral>[works for some "funkier" functions that Riemann does not work for].
<Ciro Santilli> sometimes wonders how much someone can gain from learning this besides <the beauty of mathematics>, since we can hand-wave a <Lebesgue integral> on almost anything that is of practical use. The beauty is good reason enough though.