h.deriv

强大的数学工具包

                               * * * * * * *
                               *   deriv   *
                               * * * * * * *

        "derivation"
        SYNTAX: X = deriv(P, X1, X2, ..., Xn)

        P is an expression whose value is either a polynomial over 
        Z, Q, Z/mZ, GF(p^t), a number field, over R or C, or a rational
        function. 
        X1, ..., Xn are variables, n>0.

        X is assigned the derivative of P with respect to X1, ..., Xn.


        Example 1: (correct)

                deriv(x + y, v)


        Example 2: (incorrect)

                deriv(x^2 + x + 1, x^2)

_ERR_NR_051

 
        Example 3: (correct)

                deriv(MOD(x^3 + 4*x*y + y^2 + 1/3), x, x)