[texhax] Correcting for math-mode kerning before commas and periods?

[Uwe Lück]

At 20:03 15.10.05, geolsoft at mail.ru wrote:
>On Fri, Oct 14, 2005 at 06:05:26AM -0700, Alexander McCormmach wrote:
> > Is there any way to define a command which, when placed either just
> > before the period (or comma) or just inside the final "$", will
> > un-hskip or un-kern the unwanted space that TeX is inserting?
>
>Maybe this is what you need:
>
>   $S\!$.
>
>(\! is a "negative thin space").

TeXbook p. 64: The italic correction depends on the preceding character
and the current font -- while \! depends on the font only. So \! is too crude.

I realize that I don't know whether there is a difference between
$\mathbf{f}\unkern$. and $\mathbf{f\unkern}$.

Uwe.