The MathML <munder> element is used to attach an accent or a limit under an expression. It uses the following syntax: <munder> base underscript </munder>



If true, the element is an accent, which is drawn closer to the base expression. If false (default value), the element is a limit under the base expression.


The alignment of the underscript. Possible values are: left, center, and right. This attribute is deprecated and will be removed in the future. Use CSS text-align instead.

class, id, style

Provided for use with stylesheets.


A Boolean value specifying whether more vertical space is used for displayed equations or, if set to false, a more compact layout is used to display formulas. The main effect is that larger versions of operators are displayed, when displaystyle is set to true. See also movablelimits on <mo>.


Used to set a hyperlink to a specified URI.


The background color. You can use #rgb, #rrggbb and HTML color names.


The text color. You can use #rgb, #rrggbb and HTML color names.


Sample rendering: x+y+z

Rendering in your browser: x + y + z


<munder accentunder="true">
    <mi> x </mi>
    <mo> + </mo>
    <mi> y </mi>
    <mo> + </mo>
    <mi> z </mi>
  <mo> &#x23DF; <!--BOTTOM CURLY BRACKET--> </mo>



MathML Core
# underscripts-and-overscripts-munder-mover-munderover

Browser compatibility

BCD tables only load in the browser

See also