jacobian -- the Jacobian matrix of partial derivatives

Ways to use jacobian:

• jacobian(Ideal) -- the Jacobian matrix of the generators of an ideal
• jacobian(Matrix) -- the matrix of partial derivatives of polynomials in a matrix
• jacobian(Ring) -- the Jacobian matrix of the polynomials defining a quotient ring
• jacobian(RingElement) (missing documentation)

For the programmer

The object jacobian is a method function.