ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Wed, 03 Sep 2014 03:25:09 +0200Why is diff(conjugate(x),x) unevaluated?https://ask.sagemath.org/question/24027/why-is-diffconjugatexx-unevaluated/Or, can we differentiate holomorphic functions only?
Wirtinger defined two derivations in complex analysis for which we have:
diff(x,conjugate(x)) = 0
and
diff(conjugate(x),x) = 0.
http://en.wikipedia.org/wiki/Wirtinger_derivatives
Wirtinger calculus has important applications in optimization and has been extended to quaternion functions.
Is there any situation in which leaving diff(conjugate(x),x) unevaluated is an advantage?Bill Page _ againWed, 03 Sep 2014 03:25:09 +0200https://ask.sagemath.org/question/24027/