Domain coloring of complex domain <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \{-2&lt;\Re (z)&lt;2;-2&lt;\Im (z)&lt;2\}}"><semantics><mrow class="MJX-TeXAtom-ORD"><mstyle displaystyle="true" scriptlevel="0"><mo fence="false" stretchy="false">{</mo><mo>−<!-- − --></mo><mn>2</mn><mo>&lt;</mo><mi mathvariant="normal">ℜ<!-- ℜ --></mi><mo stretchy="false">(</mo><mi>z</mi><mo stretchy="false">)</mo><mo>&lt;</mo><mn>2</mn><mo>;</mo><mo>−<!-- − --></mo><mn>2</mn><mo>&lt;</mo><mi mathvariant="normal">ℑ<!-- ℑ --></mi><mo stretchy="false">(</mo><mi>z</mi><mo stretchy="false">)</mo><mo>&lt;</mo><mn>2</mn><mo fence="false" stretchy="false">}</mo></mstyle></mrow><annotation encoding="application/x-tex">{\displaystyle \{-2&lt;\Re (z)&lt;2;-2&lt;\Im (z)&lt;2\}}</annotation></semantics></math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/af35132006cd0ef6539f0b09a0a8b0d93d71bcea" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.838ex; width:33.026ex; height:2.843ex;" alt="{\displaystyle \{-2&lt;\Re (z)&lt;2;-2&lt;\Im (z)&lt;2\}}"></span> showing module (intensity log variation) and phase (continuous variation of hue).
<a href="//commons.wikimedia.org/wiki/User:Djiboun" title="User:Djiboun">Djiboun</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>