HTML5 MathML largeop Attribute

Definition and usage

The largeop attribute takes the values true or false. When true and the surrounding math is in display style, the operator is rendered at a larger size. Operators like the summation sign have largeop set to true by default in the operator dictionary.

Which elements use it

• <mo> - marks the operator as a large operator in display mode.

Example

<math display="block">
  <mrow>
    <munderover largeop="true">
      <mo largeop="true">&#8721;</mo>
      <mrow><mi>i</mi><mo>=</mo><mn>1</mn></mrow>
      <mi>n</mi>
    </munderover>
    <msub><mi>a</mi><mi>i</mi></msub>
  </mrow>
</math>

With largeop="true" and display="block", the summation sign is enlarged and its limits are placed above and below it.