The DotProduct(v1, v2) calling sequence computes the dot product (scalar product) of v1 and v2, where v1 and v2 can be Vectors, vector fields, Student[VectorCalculus]:-Del, or Student[VectorCalculus]:-Nabla.

The Student[VectorCalculus] package has a `.` operator that you can use in place of the DotProduct command.  For example, DotProduct(v1, v2) is equivalent to .

Also,  is equivalent to Divergence(F).