An integral which has neither limit infinite and from which the integrand does not approach infinity at any point in the range of integration.
Proper Integral
See also
Improper Integral, IntegralExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Proper Integral." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ProperIntegral.html