data/mathoid/18.mml
<math
xmlns="http://www.w3.org/1998/Math/MathML" display="block" alttext="r Subscript i j">
<semantics>
<msub data-semantic-type="subscript" data-semantic-role="latinletter" data-semantic-id="5" data-semantic-children="0,4">
<mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="0" data-semantic-parent="5">r</mi>
<mrow class="MJX-TeXAtom-ORD" data-semantic-type="infixop" data-semantic-role="implicit" data-semantic-id="4" data-semantic-children="1,2" data-semantic-content="3" data-semantic-parent="5">
<mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="1" data-semantic-parent="4">i</mi>
<mo data-semantic-type="operator" data-semantic-role="multiplication" data-semantic-id="3" data-semantic-parent="4" data-semantic-added="true" data-semantic-operator="infixop,"></mo>
<mi data-semantic-type="identifier" data-semantic-role="latinletter" data-semantic-font="italic" data-semantic-id="2" data-semantic-parent="4">j</mi>
</mrow>
</msub>
<annotation encoding="application/x-tex">r_{ij}</annotation>
</semantics>
</math>