Surfaces and Vector Fields

Large values for "grid x", "grid y", and "grid z" yield cluttered plots that may take a long time to construct.    

Enter a vector field:   F(x,y,z) =		,	,	,
Enter bounds on x, y, and z :		x min:	y min:	z min:
		x max:	y max:	z max:
Axes:		grid x:	grid y:	grid z:
Enter parametric surface:  r(u,v)  =		,	,
Enter range and grid for u and v:		u min:	v min:	grid u:
		u max:	v max:	grid v: