Microfractal<p>Decagon (fractal version)</p><p>\(z_{n+1}=fold(z_n)^2+c\)</p><p>where fold is a generalized absolute value function. A complex number has two components: a real and an imaginary part.<br>If we take the absolute value of one of these parts, we can interpret this as a fold in the complex plane. For example, |re(z)| causes a fold of the complex plane around the imaginary axis, which means that the left half ends up on the right half. If we do this for the imaginary component |im(z)|, we fold the complex plane around the real axis which means that the bottom half ends up on the top half.<br>These two operations are quite similar, because the imaginary fold is just like the real fold of the plane, except that it was previously rotated 90 degrees (z * i). But what if we rotate the plane by an arbitrary number of degrees?<br>An arbitrary rotation of the complex plane can be expressed as rot(z, radians) = z * (cos(radians) + sin(radians) * i), where radians encodes the rotation.</p><p>The image here is produced, by rotating the plane exactly five times, and folding the imaginary part each time.</p><p>I found this algorithm in the Fractal Formus under the name “Correction for the Infinite Burning Ship Fractal Algorithm”.<br>It can be seen as a generalization of the burning ship obtained by folding the complex plane twice with a rotation of 90 degrees, i.e. folding both the real and the imaginary part.</p><p><a href="https://mathstodon.xyz/tags/fractalfriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fractalfriday</span></a> <a href="https://mathstodon.xyz/tags/fractal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fractal</span></a> <a href="https://mathstodon.xyz/tags/burningship" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>burningship</span></a> <a href="https://mathstodon.xyz/tags/mandelbrot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mandelbrot</span></a> <a href="https://mathstodon.xyz/tags/complexplane" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>complexplane</span></a> <a href="https://mathstodon.xyz/tags/complexnumbers" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>complexnumbers</span></a> <a href="https://mathstodon.xyz/tags/mathart" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mathart</span></a> <a href="https://mathstodon.xyz/tags/math" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>math</span></a> <a href="https://mathstodon.xyz/tags/escapetimefractals" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>escapetimefractals</span></a></p>