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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, 19 Sep 2017 13:05:40 +0100
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William Elliot <marsh@panix.com> writes:

> On Mon, 18 Sep 2017, Ben Bacarisse wrote:
<snip>
>> ...  The book uses an over bar for that case: [S, S?E].
>> 
>> For [A, B] to be an edge cut, A ?H? B = V, A ?H? B = {}, A =/= {} and
>> B =/= {}.
<snip>
> What does S?E and ?H? mean?

They means that some software has had trouble with the Content-Type of
my post.  They are the transliteration chosen by that software for byte
sequences representing a combining overline, set union and set
intersection.

-- 
Ben.