# Thread: Showing not analytic problem

1. ## Showing not analytic problem

Need help with this:

Show that f(z) = z^2*z(bar) is not analytic anywhere.

2. Originally Posted by Porter1
Need help with this:

Show that f(z) = z^2*z(bar) is not analytic anywhere.
Substitute z = x + iy then use the Cauchy-Riemann relations. (Although it's simpler to use, if you know it, the corresponding C-R relation for when you have a function of z and $\overline{z}$).