Gwen Fisher<p>I enjoy painting color wheels, and I’m delighted to have finished my first one inspired by something I saw here on Mastodon, a recent post by <span class="h-card"><a href="https://mathstodon.xyz/@arnoudbuzing" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>arnoudbuzing</span></a></span> showing a <a href="https://mathstodon.xyz/tags/mathematica" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mathematica</span></a> plot for the function<br>\[ \frac{z^2+1}{z^2-1} \] <br>This <a href="https://mathstodon.xyz/tags/complex" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>complex</span></a> function has two zeros at i and -i, shown in black, and two poles (singularities) at 1 and -1, shown in white. The origin is in the center. </p><p>This original painting is available in my Etsy shop, gwenbeads. <br><a href="https://mathstodon.xyz/tags/mathart" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mathart</span></a> <a href="https://mathstodon.xyz/tags/colorwheel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>colorwheel</span></a> <a href="https://mathstodon.xyz/tags/watercolor" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>watercolor</span></a> <a href="https://mathstodon.xyz/tags/singularity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>singularity</span></a></p>