1
$\begingroup$

What is the symbol behind the integration means in logarithmic potential ? Let's say $x_{\mu}(z)=\int_D \ln|z-\xi|d\mu(\xi)$ What does $\xi$ means ? I have been studying harmonic moment and I come across this term.

1 Answers 1

1

$\xi$ (the Greek letter "xi") is just the integration variable. You might as well rename it $w$ if you like...

  • 0
    $z$ is a parameter in the integral, so the result of the integration depends on $z$, and is the logarithmic potential of $\mu$ evaluated at $z$.2012-12-11