- integral equation of Fredholm type
- integral equation of Volterra type
- integral equation theory
- integral erection method
- integral exponent
- integral exponential function
- integral expression
- integral extension
- integral extension of a ring
- integral factor
- integral fast reactor
- integral field spectrograph
- integral field unit
- integral filtration
- integral form
- integral formula
- integral function
- integral functional
- integral funnel
- integral generator
- integral-geometric area
- integral geometry
- integral geometry of fractals
- integral graph
- integral group ring