Show that F = Jv is equivalent to the inhomogeneous Maxwell equations (show all steps!), V B J, - = V.= p. Note (not required): showing that the homogeneous Maxwell equations (the last two in equation (1.92) of your book) are equivalent to Fv+F + x Fv = 0 is a little harder. I encourage you to try it, but it won't be graded.