5)Gradient We use Gradient to describe the change of a scalar quantity along an infinitesimal distance of dl, which is df=V·dl the operator is defined by 00:0 V=i-+ Cx ay Xk OZ 6)Divergence We use Divergence to describe flux of a vector quantity for an element volume dv. which is dop=v. adv5) Gradient We use Gradient to describe the change of a scalar quantity along an infinitesimal distance of , which is, dl  df f dl  =  • the operator is defined by , z k y j x i   +   +    =    6) Divergence We use Divergence to describe flux of a vector quantity for an element volume dv, which is, d Adv   = •