[OS X TeX] which is real math mode?

William Adams will.adams at frycomm.com
Mon Dec 12 15:50:48 EST 2005

On Monday, December 12, 2005, at 03:37 PM, Alain Schremmer wrote:

> A very small puzzle:
> Why do
>    \begin{displaymath}
>    0.37\;\denom{D\mathsmaller{EKA}\;Franklins} =
>    370.\;\denom{M\mathsmaller{ILLI}\;Franklins}
>    \end{displaymath}
> and
>    \begin{center}
>    $0.37\;\denom{D\mathsmaller{EKA}\;Franklins} =
>    370.\;\denom{M\mathsmaller{ILLI}\;Franklins}$
>    \end{center}
> not typeset the same way? (In the former, \mathsmaller does not seem 
> to have any effect.)
> \DeclareMathAlphabet{\denom}{OT1}{cmss}{sbc}{n}
> with
> TeXShop 1.40 on Mac 10.3.9

\begin{displaymath} puts one into a displayed math environment, like to 
the $$ 2 + 2 = 4 $$ of Plain TeX (which should not be used in LaTeX).

The other is a text / in-line math construct inside of a (non-math) 
displayed environment. It is okay to use $ 2 + 2 = 4 $ in LaTeX.

One should remember that one doesn't get the same size-changing options 
in in-line text math mode as in a display mode.


William Adams
senior graphic designer
Fry Communications

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