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Re: [Groff] Re: heirloom eqn
From: |
Gunnar Ritter |
Subject: |
Re: [Groff] Re: heirloom eqn |
Date: |
Sun, 13 Jan 2008 22:15:23 +0100 |
User-agent: |
Heirloom mailx 12.4pre 1/7/08 |
Werner LEMBERG <address@hidden> wrote:
> > geqn seems to ignore part of explicit provided spaces "~" in the
> > above example (it seems to be the default spacing anyway). Is this
> > intended behaviour: "increase spacing only by the difference of
> > explicit provided space and default space"?
>
> It seems so. I've compared the distances of the equations
>
> x = y + z
>
> and
>
> x~=~y~+~z
>
> in the original eqn2e.ps documentaion file `Typesetting Mathematics --
> User's Guide (Second Edition), pageĀ 1 andĀ 2.
This seems to have been generated using a later variant
of eqn than the one of the Heirloom tools, which descends
from the one distributed with OpenSolaris.
Plan 9 has a variant of the original eqn that has been
extended to provide more elaborate spacing; without
explicit spaces, it generates a "\|\^" before the
equation sign instead of only a "\|", as the OpenSolaris
and (the fixed) Heirloom variants do. Maybe the version
with which the eqn2e.ps file has been generated was
similar to the Plan 9 one.
Since much of the actual appearance depends on the fonts,
it might be interesting to look at the first edition of
the eqn user's guide as printed on a CAT, as in the
hardcopy of the 7th edition manuals. Unfortunately, I
currently do not have my copy at hand.
Gunnar
Re: [Groff] OTF in Groff or -mom in Heitrloom troff..., Werner LEMBERG, 2008/01/10