Math & Science ⇒ Optimization: Max of x and placing x underneath Max

[latexhelp1]

I would like to write Max_x to denote that I'm going to maximize an expression with respect to x.

Currently, I write

Code: Select all

$Max_x$

That places the x diagonally to the right.

How would I place the x directly underneath the max? Like placing it underneath the a in Max?

[localghost]

There is a predefined operator exactly for this purpose.

Code: Select all

\documentclass{article}
\usepackage[T1]{fontenc}

\begin{document}
  \[
    \max_x
  \]
\end{document}

Thorsten

[Stefan Kottwitz]

If you would really need Max, and not the already defined operator \max, I would declare an operator for it. \limits causes the subscript to be written below the expression.

Code: Select all

\documentclass{article}
\usepackage{amsmath}
\DeclareMathOperator*{\Max}{Max}
\begin{document}
$\Max\limits_x$
\end{document}

Stefan

[latexhelp1]

Thank you both Stefan and Thorston.

I am trying to do this in beamer and within equation mode for a specific purpose, and neither seems to work.

I can only get it to compile with:

Code: Select all

\documentclass{beamer} %
\usetheme{CambridgeUS}
\usepackage[latin1]{inputenc}
\usefonttheme{professionalfonts}
\usepackage{times}
\usepackage{tikz}
\usepackage{amsmath}
\usepackage{verbatim}
\usetikzlibrary{arrows,shapes}

\begin{frame}
\frametitle{Frame Title}

\begin{equation*}
        \tikz[baseline]{
            \node[fill=blue!20,anchor=base] (t1)
            {$Max_f$};
        }
\end{equation*}

\end{frame}
\end{document}

If you would really need Max, and not the already defined operator \max, I would declare an operator for it. \limits causes the subscript to be written below the expression.

Code: Select all

\documentclass{article}
\usepackage{amsmath}
\DeclareMathOperator*{\Max}{Max}
\begin{document}
$\Max\limits_x$
\end{document}

Stefan

[Stefan Kottwitz]

My code example works, also in your example code, producing this TikZ node:

max-operator.png (1.5 KiB) Viewed 25225 times

I can only get it to compile with

Perhaps don't show some other code, that works for you, but show the code you tried which doesn't work, so we could tell you the cause of the problem.

Stefan

[latexhelp1]

Stefan,

The code in:
http://latex-community.org/forum/viewto ... 45&t=17758

I cannot get the Max to work in it.

My code example works, also in your example code, producing this TikZ node:

Perhaps don't show some other code, that works for you, but show the code you tried which doesn't work, so we could tell you the cause of the problem.

Stefan

[Stefan Kottwitz]

I cannot get the Max to work in it.

If I use exactly my code in this example, it works. Perhaps you forgot the \DeclareMathOperator line, or you did something else. Who should guess what's wrong if you don't show it. In other cases you posted good minimal examples.

Stefan

[latexhelp1]

Never mind! I had made a typo. Thank you Stefan!!