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Re: [Groff] Typesetting arbitrary fractions?

From: Tadziu Hoffmann
Subject: Re: [Groff] Typesetting arbitrary fractions?
Date: Tue, 8 Nov 2005 10:27:50 +0100
User-agent: Mutt/1.5.6i

> However, this would not necessarily transfer to other fonts,
> since the \(f/ in standard PostScript occurs only in the
> Symbol font and so there is only one version of it. None the
> less, I have made the comparison in some standard Adobe font
> families (Times, Bookman, Palatino, Helvetica) and the bar in
> \(12 in all seems to be identical to \(f/ in Symbol.

I can't confirm this.  I've inspected a few fonts and those
that I've looked at all have their own "fraction" character,
and they're all different.  For example, the one in Times-Roman
is somewhat narrower than the one in Symbol.  And in Minion
(the PostScript Language Reference Manual (third edition)
is set in Minion) the ends are not horizontal as in Times,
but more like perpendicular to the stroke (see the glyph
image shown in StandardEncoding Encoding Vector, page 784).

> In fact, when I set \(12 and \(f/ side by side in TR and
> view at hign magnification, the two sloping bars seem to
> be identical (which is what you would expect in a properly
> designed font family).

Yes, that does seem to be true in general, at least for the
Adobe fonts.

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