Re: Deleting Integrate[] transformation rule

*To*: mathgroup at smc.vnet.net*Subject*: [mg87564] Re: Deleting Integrate[] transformation rule*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Sun, 13 Apr 2008 03:31:28 -0400 (EDT)*Organization*: The Open University, Milton Keynes, UK*References*: <ftq5ab$it$1@smc.vnet.net>

UHAP023 at alpha1.rhbnc.ac.uk wrote: > When integrating Mathematica knows the result of D[EllipticF[phi,m, phi]] = ====================================================================!! Syntax error: a square bracket is missing. > 1/Sqrt[1-m*Sin[phi]^2]] and will produce expressions containing > EllipticF[] in its result when it encounters such a pattern. I want > to prevent this -- that is Unprotect Integrate[] and make it forget > this rule so that EllipticF[] will not appear in the result. No need to do that: just use the correct syntax as in, In[1]:= D[EllipticF[phi, m], phi] Out[1]= 1 --------------------- 2 Sqrt[1 - m Sin[phi] ] Regards, -- Jean-Marc