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How to type this expression, where has \min on top and \forall at the bottom?

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I'd remove the universal quantifier. – Marc van Dongen Sep 19 '12 at 18:13
up vote 14 down vote accepted

The bottom part is a TeX subscript (like \sum):

\min_{\forall s \in S_j} q_k(s)


Textstyle vs. Displaystyle

Compile the following code sequence to understand the difference between textstyle and displaystyle:

\def\sample{\min\nolimits_{\forall s \in S_j} q_k(s)}
\noindent Text-Textstyle: \(\sample\)\\
          Text-Displaystyle: \(\displaystyle\sample\)
    \textrm{Text-Textstyle: }\textstyle\sample
    \textrm{Display-Displaystyle: }\sample

Output code

You can also use \nolimits and \limits to force textstyle limits and displaystyle limits respectively:

\min\limits_{\forall s \in S_j} q_k(s)
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hi, it seems this is not in the same format as the picture in the question – william007 Sep 19 '12 at 16:55
@william007: how it comes out depends on whether you are on displaystyle or textstyle; try inside a \[...\]. Qrrbrb..: it's a TeX subscript (/nitpick ;)). – morbusg Sep 19 '12 at 16:57
@william007 morbusg is right. I've updated my answer to explain the difference between textstyle and displaystyle. – Qrrbrbirlbel Sep 19 '12 at 17:08

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