[Tex/LaTex] Placement of ellipsis

ellipsispunctuationtypography

Consider the following example:

\documentclass{article}
\begin{document}
$(1-\theta_1) \dots (1-\theta_m)$
\end{document}

output

Isn't the ellipsis supposed to be vertically centered since they indicate multiplication?

Update

I'm now fully convinced that I'm wrong. To everyone with access to The TeXbook, have a look at page 172. :)

Best Answer

In the base LaTeX format \dots is just an alias for \ldots and is always on the baseline.

If you add amsmath then it does change according to context, but not in this case, it is more optimised for the case where the binary operator is explicit:

\documentclass{article}
%\usepackage{amsmath}
\begin{document}
$(1-\theta_1) \times \dots \times(1-\theta_m)$
\end{document}

The dots will raise if you uncomment amsmath.

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