. . "integral-equation" . . "Integral Equation" . "Integral equation" . . "Integral" . "integral" . . "Integral Equations" . "theory of integral equations" . . . "Integral equation" . "Volterra equation" . "Integral_equation#Numerical_solution" . . . . . . . . . . "integral equation" . "boundary integral equations" . . "integral operator equations" . .