I wanted to get theta below argmax in the middle

I wanted to get theta below argmax in the middle . I used the following code:

$\theta_i$ = $argmax_{\theta} Q(\theta, \theta_i)$
  • (1) welcome, (2) the limit only goes under the argmax when it is used in display math context, you are using $...$ which is inline math mode, there the limit is not shown below argmax as it will disturb the line spacing. – daleif Aug 10 '16 at 7:02
  • BTW: next time please provide a full example, you are missing the document class. Besides in your formula, the two middle $ are not needed, the = should also be math mode – daleif Aug 10 '16 at 7:03
  • You can highlight code in your post using back-ticks. For code-blocks indent them by four spaces or use the {} on the gui. – user30471 Aug 10 '16 at 7:07

I think you are looking for an operator \argmax which can be defined in the following way (needs amsmath)


To have "theta below argmax in the middle" in inline math, you have to specify \limits when using it.






\noindent Inline math: $\theta_i = \argmax\limits_{\theta} Q(\theta, \theta_i)$


\noindent Displayed math

\[\theta_i = \argmax_{\theta} Q(\theta, \theta_i)\]



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  • @egreg I could get the format of code for answers and questions by using the back-quote but same didn't work for writing a code snippet in the comment section. Could you please explain? – MSKantulu Aug 10 '16 at 10:22
  • @MSKantulu Comments obey slightly different rules; for instance, in order to print \\ you need double back quotes. – egreg Aug 10 '16 at 10:25
  • @egreg can you give any helping link for these formatting stuffs in comments? The double back quotes didn't get me on the next line – MSKantulu Aug 10 '16 at 10:33
  • @MSKantulu Look at posts under meta.tex.stackexchange.com/search?q=code+comment – egreg Aug 10 '16 at 10:35

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