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Re: sqrt troubles with eqn

From: Werner LEMBERG
Subject: Re: sqrt troubles with eqn
Date: Fri, 21 Sep 2007 19:44:10 +0200 (CEST)

> For -Tdvi, I was not able to find a standalone DVI to PostScript
> converter, and the only to DVI to PDF converters required a
> non-standalone library called kpathsea.

Well, kpathsea can be compiled stand-alone.  However, this isn't
trivial since basically noone needs that.

> I just want to have square root working correctly: it seems as if
> eqn is giving zero width to the radical sign (perhaps with \z\(sr or
> something else) and the upper bar (\z\(rn).

I just can repeat: Both AT&T's and groff's eqn use the standard
PostScript glyph for the square root sign.  It's not possible to get a
better appearance by scaling.

A possible solution to this situation would be to extend groff eqn so
that it uses a larger set of mathematical glyphs which, among others,
contain better shapes for large radical signs and parentheses.  The
`cmex10' font used in DVI mode exists in a PS version also (attached);
it might be a worthwile exercise to add this font to groff (using the
same groff glyph names as provided for `devdvi').

Any takers to experiment with?  As soon as groff finds those glyphs it
uses them...


Attachment: cmex10.pfb.bz2
Description: Binary data

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