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From: Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups: comp.programming,alt.algebra.help
Subject: Re: on cut edges and bonds, graph theory
Date: Mon, 25 Sep 2017 20:32:15 +0100
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David Brown <david.brown@hesbynett.no> writes:

> On 22/09/17 22:18, Ben Bacarisse wrote:
>> David Brown <david.brown@hesbynett.no> writes:
>> <snip>
>>> Out of curiosity, how do you type the S̅?  Is it a combining macron or
>>> something?
>> 
>> A macron is usually shorter: S̄.  It's a combining overline (U+0305).
>> 
>> I use Emacs as my Usenet client so I use that directly because it can
>> auto-complete (and search) Unicode character names.  When I write the
>> original, I was not sure what character was the right one (and I did
>> indeed try a macron first!) so seeing all the completion options was
>> very helpful.
>
> Like this: ̅S ?

Yes, except that combining marks go after the glyph they combine with.
Whether Emacs will show the actual combined symbol or not seems to
depend on the font being used.  Not sure why.  Maybe some fonts don't
include the right data.

> I don't use Emacs (I never could feel comfortable with
> it), so here I am stuck with ctrl+shift+u 0305 and the S.

That works fine, too.

> I guess if I
> needed it often, I could add it as a compose key or an Alt-Gr key.
> Usually if I am writing maths, it will be in LaTeX anyway, rather than
> Usenet posts.

Yup.  Having French and Spanish family I need few accents and so on,
but they are all compose sequences in this laptop.

> But my son often has need of odd symbols, especially IPA symbols for
> linguistics - I'll suggest he looks at Emacs as a possible convenient
> way to enter these, as he is always interested in alternative methods.

Emacs has a few IPA input methods so you can type symbols using plain
character sequences.  I don't know how easy they are to use for serious
work.

-- 
Ben.