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