leaving only where is that algebra's unit -vector, the pseudoscalar. The result is Thus, as in the two-dimensional (complex analysis) case, the value of an analytic (monogenic) function at a point can be found by an integral over the surface surrounding the point, and this is valid not only for scalar functions but vector and general multivector functions as well. See also Cauchy–Riemann equations Methods of contour integration Nachbin's theorem Morera's theorem Mittag-Leffler's theorem Green's function generalizes this idea to the non-linear setup Schwarz integral formula Parseval–Gutzmer formula Bochner–Martinelli formula Notes References . External links Augustin-Louis Cauchy Theorems in complex analysis