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Complex conjugate differentiation

• To: mathgroup at smc.vnet.net
• Subject: [mg107163] Complex conjugate differentiation
• From: Paperorbifold <kgodelNOSPAM at liberoNOSPAM.it>
• Date: Thu, 4 Feb 2010 06:28:23 -0500 (EST)

In[1]:=D[z z*, z*]
Out[1]=z
where z*=Conjugate[z], while
In[2]:=D[z z*, z]
Out[2]=Conjugate[z] + z Conjugate'[z]
My question is: which is the best way to get as output
Out[2]=Conjugate[z]?
Should I properly define StarProduct or is there another even
straightforward solution?
Thanks a lot.

-- 
...and I will make them pay for
what they've done! (J.L. Picard)

• Follow-Ups:
  • Re: Re: Complex conjugate differentiation
    • From: Mark McClure <mcmcclur@unca.edu>
  • Re: Complex conjugate differentiation
    • From: Daniel Lichtblau <danl@wolfram.com>