-hidden="true"><span class="base"><span class="strut" style="height:0.6833em;"></span><span class="mord mathnormal" style="margin-right:0.00773em;">R</span></span></span></span>, the enveloping algebra <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><msup><mi>R</mi><mrow><mi mathvariant="sans-serif">o</mi><mi mathvariant="sans-serif">p</mi></mrow></msup><mo>⊗</mo><mi>R</mi></mrow><annotation encoding="application/x-tex">R^{\mathsf{op}} \otim