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I am wondering how can I ensure that an argument gets placed underneath \min when I use an align environment.

When I use math mode and write

min_{x_1,\dots x_T} 

the {x_1,\dots x_T} is placed directly underneath min.

However when I use an align environment and write

  min_{x_1\dots x_T} 

the {x_1,\dots x_T} is placed to the bottom left of \min.

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Welcome to TeX.SE. While code snippets are useful in explanations, it is always best to compose a fully compilable MWE that illustrates the problem including the \documentclass and the appropriate packages so that those trying to help don't have to recreate it. – Peter Grill Mar 28 '12 at 1:58
Also, did you mean to use $...$ in the first example instead of \[ ... \]? Or perhaps you just meant \min instead of min? – Peter Grill Mar 28 '12 at 1:59
up vote 21 down vote accepted

The macro is \min, not min.

When you use \min in display mode (ie, within \[ \min_{<subscript>} \], or within the align environment), the subscript is placed underneath by default.

When you use \min in inline math mode (ie, with $\min_{<subscript>}$), then you need to specify \displaystyle, or \limits to get the subscript underneath.

All four below produce:

enter image description here


Inline mode:
$\displaystyle \min_{x_1,\dots x_T}$
$\min\limits_{x_1,\dots x_T}$

Display mode:
\[ \min_{x_1,\dots x_T} \]
    \min_{x_1\dots x_T} 
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