Derivative of a Conjugate

*To*: mathgroup at smc.vnet.net*Subject*: [mg87208] Derivative of a Conjugate*From*: David Forehand <D.Forehand at mech.gla.ac.uk>*Date*: Fri, 4 Apr 2008 02:57:31 -0500 (EST)

Hi All, My first posting here, so please forgive me if I am being a bit stupid. I'm entering the following input: D[f[t0, t1], t0, t1] /. {f -> ((#1^2)*Conjugate[a[#2]] &)} and Mathematica gives the following output: 2 t0 a'[t1] Conjugate'[a[t1]] I would have expected: 2 t0 Conjugate[a'[t1]] i.e. the derivative of a conjugate is the conjugate of the derivative. Any idea how a force Mathematica to give the result I am expecting? In the above, I am assuming the variables "t0" and "t1" are real and the variable "a" is complex, although I have not explicitly told Mathematica this. Thanks Very Much in advance, David

**Follow-Ups**:**Re: Derivative of a Conjugate***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>