<mrow>

Baseline 2023
Newly available

Since January 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The <mrow> MathML element is used to group sub-expressions, which usually contain one or more operators with their respective operands (such as <mi> and <mn>). This element renders as a horizontal row containing its arguments.

When writing a MathML expression, you should group elements within an <mrow> in the same way as they are grouped in the mathematical interpretation of the expression. Proper grouping helps the rendering of the expression in several ways:

  • It can improve the display by possibly affecting spacing and preventing line breaks.
  • It simplifies the interpretation of the expression by automated systems such as computer algebra systems and audio renderers.

Attributes

This element accepts the global MathML attributes.

Examples

html
<math display="block">
  <mfrac>
    <mrow>
      <!-- numerator content grouped in one mrow -->
      <mn>1</mn>
      <mo>+</mo>
      <mi>K</mi>
    </mrow>
    <mrow>
      <!-- denominator content grouped in one mrow -->
      <mn>3</mn>
      <mrow>
        <!-- fenced expression grouped in one mrow -->
        <mo>(</mo>
        <mrow>
          <!-- fenced content grouped in one mrow -->
          <mi>x</mi>
          <mo>+</mo>
          <mi>y</mi>
        </mrow>
        <mo>)</mo>
      </mrow>
    </mrow>
  </mfrac>
</math>

Technical summary

Specifications

Specification
MathML Core
# horizontally-group-sub-expressions-mrow

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
mrow

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support

See also

  • Grouping HTML elements: <div>