10 equivalent ways of defining quasicircles
Published:
I have been dealing with a lot of quasicircles lately, and I was thinking it would be practical to write a post about its many equivalent definitions. Quasicircles are Jordan curves which satisfy certain nice analytic and geometric conditions. While conformal maps of the Riemann sphere (aka Möbius transformations) map circles to circles, quasiconformal maps map quasicircles to quasicircles.