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Der

the derivative of a rational function
Syntax 

Der(F, X:INDET):POLY

where F is a polynomial or a rational function.

Description
This function returns the derivative of F with respect to the indeterminate X.

Example 
  Use R ::= QQ[x,y];
  Der(xy^2,x);
y^2
-------------------------------
  Define Jac(F)  --> The Jacobian matrix for a polynomial.
    Return Mat([[Der(F, X) | X In Indets()]]);
  EndDefine;
  Jac(xy^2);
Mat([
  [y^2, 2xy]
])
-------------------------------
  Der(x/(x+y),x);
y/(x^2 + 2xy + y^2)
-------------------------------


See Also