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Normal element
open-in-new
<p>In <a href="/facts/Mathematics/pxTouaz4">mathematics</a>, an <a href="/facts/Element_(mathematics)/Q2mx1vHL">element</a> of a <a href="/facts/*-algebra/vcE5TWnT">*-algebra</a> is called normal if it <a href="/facts/Commutative_property/WaYxJLxd">commutates</a> with its adjoint. </p>