<msub>

MathML の <msub> 要素は式に下付きを付けるために用います。
構文は <msub> base subscript </msub> となります。

class, id, style

Provided for use with stylesheets.

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.

subscriptshift

下付き部分を本体のベースラインから下げる最小量を length value (en-US) として指定します。

Sample rendering:

Rendering in your browser: $X_1$

<math>

  <msub>
    <mi>X</mi>
    <mn>1</mn>
  </msub>

</math>

• Starting with Gecko 26.0 (Firefox 26 / Thunderbird 26 / SeaMonkey 2.23 / Firefox OS 1.2) it is no longer possible to use <none /> as a child element. The rendering has been made more consistent with equivalent configurations of <msup> and <mmultiscripts> and a bug with an incorrect application of the superscriptshift attribute has been fixed (see バグ 827713 for details).

• <msup> (Superscript)
• <msubsup> (Subscript-superscript pair)
• <mmultiscripts> (Prescripts and tensor indices)