LaTeX question

[VJ]

Hello,

I have a simple question for the LaTeX users in here. In my document, I have the following:

\documentclass{book}
\usepackage{titlefoot}
\usepackage{geometry}
\usepackage{epsfig}
\usepackage{theorem}
\usepackage{multirow}
\usepackage{multicol}
\usepackage{amsfonts}

(I'm using the latest stable MiKTeX on Windows)

Now, I'm trying to write a formula which uses the supremum: \sup.

I seem to recall that $\sup_X$ would put the X below the sup (not in a normal subscript way), just like it would with $\lim_{a \rightarrow 0}$.
For some strange reason, the system puts the X as if it were a normal subscript; both in the case of \sup, and in the case of \lim.

Any suggestions on why this is the case?

Thanks!


Jorg

[VJ]

Found it... It depends on the style used in the math environment. Using \[ \] as math environment delimiters works; but I could not use it because I wanted an equation array that was numbered.

The workaround is to simply put: \displaystyle{sup_X} inside the math environment (in my case: eqnarray). This tells LaTeX to use the style from the \[ \].


Jörg