<a href="https://en.wikipedia.org/wiki/Superformula" class="extiw" title="en:Superformula">Superformula</a> samples. <i>a</i> = <i>b</i> = 1; <i>m</i>, <i>n</i><sub>1</sub>, <i>n</i><sub>2</sub> and <i>n</i><sub>3</sub> are shown in picture.
Claudio Rocchini
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>