The evalVF(F, v) calling sequence evaluates the vector field F at the point v.  The parameters, F and v, must have the same dimension, but do not need to be defined in the same coordinate system.

The vector field parameter, F, can also be specified as a Vector-valued procedure, in which case this procedure is evaluated at the coordinates of the Vector v.

Coordinates, Student[VectorCalculus], Student[VectorCalculus][GetCoordinates], Student[VectorCalculus][MapToBasis], Student[VectorCalculus][SetCoordinates], Student[VectorCalculus][Vector], Student[VectorCalculus][VectorField]