<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

Implicit ARIA role	None

Specifications

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

Browser compatibility

BCD tables only load in the browser