>From searching the net (1), I gather that log(x).conjugate(x).diff(x) should yield (log(x)/x).conjugate()
but Sage cannot evaluate such differentiated conjugates of functions: sage: ex=log(x).conjugate() sage: ex=log(x).conjugate(); ex conjugate(log(x)) sage: ex.diff(x) D[0](conjugate)(log(x))/x sage: ex.diff(x).subs(x=-1/2) -2*D[0](conjugate)(I*pi + log(1/2)) sage: ex.diff(x).subs(x=-1/2).n() --------------------------------------------------------------------------- TypeError: cannot evaluate symbolic expression numerically which should just be sage: conjugate(log(x)/x).subs(x=-1/2).n() 1.38629436111989 + 6.28318530717959*I if I understand it correctly. Am I wrong? (1) https://answers.yahoo.com/question/index?qid=20120210002819AAtlqub PS: Note also that Wolfram gives d/dx(log(x)^conjugate) = (Conjugate'(log(x)))/x when asked for the derivative of conjugate of log(x). Regards, -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
