powerset of th set <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 \{x,\,y,\,z\}}"><semantics><mrow class="MJX-TeXAtom-ORD"><mstyle displaystyle="true" scriptlevel="0"><mo fence="false" stretchy="false">{</mo><mi>x</mi><mo>,</mo><mspace width="thinmathspace"></mspace><mi>y</mi><mo>,</mo><mspace width="thinmathspace"></mspace><mi>z</mi><mo fence="false" stretchy="false">}</mo></mstyle></mrow><annotation encoding="application/x-tex">{\displaystyle \{x,\,y,\,z\}}</annotation></semantics></math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/e71fe5dd5c18eb5adc01f41206cca6bed1bed1cf" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.838ex; width:8.74ex; height:2.843ex;" alt="{\displaystyle \{x,\,y,\,z\}}"></span>
<a rel="nofollow" class="external text" href="http://kulla.me/">Stephan Kulla</a> (<a href="//commons.wikimedia.org/wiki/User:Stephan_Kulla" title="User:Stephan Kulla">User:Stephan Kulla</a>)
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>