<mrow>

The MathML <mrow> 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.
  • It allows for more intelligent line-breaking and indentation.
  • It simplifies the interpretation of the expression by automated systems such as computer algebra systems and audio renderers.

Attributes

class, id, style
Provided for use with stylesheets.
dir
Overall directionality of formulas. Possible values are either ltr (left to right) or rtl (right to left).
href
Used to set a hyperlink to a specified URI.
mathbackground
The background color. You can use #rgb, #rrggbb and HTML color names.
mathcolor
The text color. You can use #rgb, #rrggbb and HTML color names.

Examples

<math> 

  <mrow>
    <mn> 1 </mn>
    <mo> + </mo>
    <mn> 1 </mn>
  </mrow>
 
  <mrow>
    <mo> ( </mo>
    <mrow>
      <mi> x </mi>
      <mo> , </mo>
      <mi> y </mi>
    </mrow>
    <mo> ) </mo>
  </mrow>

</math>

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support Not supported (24 only) 1.0 (1.7 or earlier) Not supported 9.5 5.1
dir Not supported 12.0 (12.0) Not supported Not supported Not supported
href Not supported WebKit bug 85733 7.0 (7.0) Not supported Not supported Not supported WebKit bug 85733
mathbackground Not supported (24 only) 4.0 (2.0) Not supported Not supported 5.1
mathcolor Not supported (24 only) 4.0 (2.0) Not supported Not supported 5.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support Not supported Not supported 1.0 (1.0) Not supported Not supported Not supported
dir Not supported Not supported 12.0 (12.0) Not supported Not supported Not supported
href Not supported Not supported 7.0 (7.0) Not supported Not supported Not supported
mathbackground Not supported Not supported 4.0 (2.0) Not supported Not supported Not supported
mathcolor Not supported Not supported 4.0 (2.0) Not supported Not supported Not supported

Specifications

Specification Status Comment
MathML 3.0 Recommendation Current specification
MathML 2.0 Recommendation Initial specification

See also

  • Grouping HTML elements: <div>

Document Tags and Contributors

Contributors to this page: fred.wang, jswisher, fscholz, Sheppy
Last updated by: fscholz,