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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: Tue, 26 Sep 2017 11:53:07 +0100
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David Brown <david.brown@hesbynett.no> writes:

> On 25/09/17 21:32, Ben Bacarisse wrote:
>> 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.
>
> Interesting - I did not realise there was a difference.  Putting the
> combining mark first gives ̅S while putting it last gives S̅.  There is a
> noticeable difference in these two glyphs (at least with the fonts I am
> using) - putting the combing mark last sets its height to fit the S
> better.

Oh!  Not what I see.  Here, the first puts the overline on the space,
the second on the S.  I don't think the combining characters work very
well in most fonts and display systems.  I used this one only because I
was referring to a book that used that specific notation and there was a
chance the OP would see what I intended.

<snip>
-- 
Ben.