A triple integral operator used to integrate functions over three-dimensional regions in multivariable calculus.
Examples
Triple integral over a volume
\iiint_V dV = \iiint_V dx\,dy\,dz
Triple integral with specific bounds
\iiint_{[0,1]^3} xyz\,dx\,dy\,dz
Triple integral in spherical coordinates
\iiint_V r^2\sin\phi\,dr\,d\phi\,d\theta