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

[Uwe Lück]

At 15:05 14.10.05, you wrote:

>I'm wondering if it's possible to systematically correct for space that
>TeX inserts after italicized letters in math mode. Such a correction is
>needed in exactly those situations where one would *not* apply the
>italics correction (\/), i.e., before commas and periods.
>
>[...]
>
>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?

According to TeXbook p. 280f., there is a primitive command \unkern,
such that \unkern$ should serve your desire -- since the italic correction
is a kern (TeXbook p. 287).

(Accidentally I was studying the italic correction anyway.)

Uwe.