Die Multiplikation <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 \mu _{A}}"><semantics><mrow class="MJX-TeXAtom-ORD"><mstyle displaystyle="true" scriptlevel="0"><msub><mi>μ<!-- μ --></mi><mrow class="MJX-TeXAtom-ORD"><mi>A</mi></mrow></msub></mstyle></mrow><annotation encoding="application/x-tex">{\displaystyle \mu _{A}}</annotation></semantics></math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a5f50df49aa96673fa1a3853443075a6ac869499" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.838ex; width:2.867ex; height:2.176ex;" alt="{\displaystyle \mu _{A}}"></span> einer Algebra <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 A}"><semantics><mrow class="MJX-TeXAtom-ORD"><mstyle displaystyle="true" scriptlevel="0"><mi>A</mi></mstyle></mrow><annotation encoding="application/x-tex">{\displaystyle A}</annotation></semantics></math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7daff47fa58cdfd29dc333def748ff5fa4c923e3" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.338ex; width:1.743ex; height:2.176ex;" alt="A"></span> ist genau dann assoziativ, wenn dieses Diagramm kommutiert.
<a href="//commons.wikimedia.org/w/index.php?title=User:Markus_Schmaus&amp;action=edit&amp;redlink=1" class="new" title="User:Markus Schmaus (page does not exist)">Markus Schmaus</a>
2006-08-11
<span class="int-own-work" lang="en">Own work</span>