![[Graphics:Images/index_gr_1.gif]](Images/index_gr_1.gif)
FourDivergence[exp, FourVector[p, mu]] calculates the partial derivative of exp w.r.t. p(mu). FourDivergence[exp, FourVector[p, mu], FourVector[p,nu], ...]gives the multiple derivative.
See also: RussianTrick.
![[Graphics:Images/index_gr_2.gif]](Images/index_gr_2.gif){kind=small}
![[Graphics:Images/index_gr_3.gif]](Images/index_gr_3.gif)
![[Graphics:Images/index_gr_4.gif]](Images/index_gr_4.gif){kind=small}
![[Graphics:Images/index_gr_5.gif]](Images/index_gr_5.gif)
![[Graphics:Images/index_gr_6.gif]](Images/index_gr_6.gif){kind=small}
![[Graphics:Images/index_gr_7.gif]](Images/index_gr_7.gif)
![[Graphics:Images/index_gr_8.gif]](Images/index_gr_8.gif){kind=small}
![[Graphics:Images/index_gr_9.gif]](Images/index_gr_9.gif)
| The FeynCalc Book |  FORM2FeynCalc |  FourLaplacian |