RE: [Groff] Math symbol upside down?

[Ted Harding]

On 06-May-06 Clarke Echols wrote:
> I am playing around with a little project and decided to make a
> drawing using groff accompanied by mathematical analysis text.
> 
> I decided to use the \(~= sequence for the "approximately equal"
> symbol in the math table, using the eroff manual I have from the
> late 1980s as a reference.  In that manual, the symbol is a
> horizontal bar with a tilde bar above it, but in the groff package
> I got with cygwin, the tilde is on the bottom.  My PostScript
> tutorial by Ross Smith indicates that the math font character is
> actually a pair of tildes.
> 
> What's going on?  I've never seen a tilde on the bottom before.
> Is this a take-off spoof like GNU's not Unix? :-)
> 
> Clarke

Hmm, I'm not sure where you are getting this result from.

Check out .../devps/S and you should find that both \(~=
and \(~~ map to PostScript "approxequal" which is your
"pair of tildes".

Best wishes,
Ted.

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Date: 06-May-06                                       Time: 07:46:37
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