diff (or derive) takes two arguments : an expression and a variable
(resp a vector of the variable name) (see several variable functions in
1.50). If only one argument is provided, the derivative
is taken with respect to x diff (or derive) returns the derivative (resp a vector of
derivative) of the expression with respect to the variable (resp with respect
to each variable) given as second argument.
Compute the 3 first order partial derivatives of
x*y2*z3 + x*y*z.
[y^2*z^3+y*z, x*2*y*z^3+x*z, x*y^2*3*z^2+x*y]
giac documentation written by Renée De Graeve and Bernard Parisse