Re: on cut edges and bonds, graph theory

From	Richard Heathfield <rjh@cpax.org.uk>
Newsgroups	comp.programming, alt.algebra.help
Subject	Re: on cut edges and bonds, graph theory
Date	2017-09-24 07:39 +0100
Organization	Fix this later
Message-ID	<oq7jus$26s$1@dont-email.me> (permalink)
References	(8 earlier) <Pine.NEB.4.64.1709212034090.26559@panix5.panix.com> <87k20qb3vy.fsf@bsb.me.uk> <Pine.NEB.4.64.1709221937340.19630@panix5.panix.com> <87shfd4j8m.fsf@bsb.me.uk> <Pine.NEB.4.64.1709232202210.10136@panix5.panix.com>

Cross-posted to 2 groups.

Show all headers | View raw

On 24/09/17 06:04, William Elliot wrote:
>> I didn't use any non-standard proprietary control characters.
> 
>>> 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?
> 
> That is what is unreadable.  What you see here is was cut and
> pasted into this reply.  On the screen, ? appears as a high-bit
> blank, ~E appears as a single character, ctrl-E and ~H appears
> as a single character, ctrl-H.  What did you type to get that?

On my system, the following five-key combination will do it for 
intersections:

[Shift-Ctrl-U][2][2][2][9]

Which results in the [∩] character (the INTERSECTION character).

And for unions it's [Shift-Ctrl-U][2][2][2][A]:

Which results in the [∪] character (the UNION character). As I look at 
them when writing this, they are perfect renditions of the usual symbols 
employed by mathematicians for those purposes.

Your system may behave differently, of course. Computers are like that.

2229 and 222A are, respectively, the Unicode code points for 
intersections and unions. To the best of my knowledge these are 
standard, non-proprietary characters.

-- 
Richard Heathfield
Email: rjh at cpax dot org dot uk
"Usenet is a strange place" - dmr 29 July 1999
Sig line 4 vacant - apply within

Thread

on cut edges and bonds, graph theory Daniel Bastos <dbastos@toledo.com> - 2017-09-18 12:51 -0300
  Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-18 20:40 +0100
    Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-18 21:39 -0700
      Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-19 13:05 +0100
        Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-19 19:47 -0700
          Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-20 14:28 +0100
            Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-20 21:06 -0700
              Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-21 17:03 +0100
                Re: on cut edges and bonds, graph theory Daniel Bastos <dbastos@toledo.com> - 2017-09-21 15:06 -0300
                Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-21 21:24 +0100
                Re: on cut edges and bonds, graph theory Daniel Bastos <dbastos@toledo.com> - 2017-09-21 17:57 -0300
                Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-21 23:40 +0100
                Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-21 20:45 -0700
                Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-23 02:27 +0100
                Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-22 19:49 -0700
                Re: on cut edges and bonds, graph theory Richard Heathfield <rjh@cpax.org.uk> - 2017-09-23 08:04 +0100
                Re: on cut edges and bonds, graph theory Daniel Bastos <dbastos@toledo.com> - 2017-09-23 08:41 -0300
                Re: on cut edges and bonds, graph theory Paul N <gw7rib@aol.com> - 2017-09-24 14:00 -0700
                Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-23 14:50 +0100
                Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-23 22:04 -0700
                Re: on cut edges and bonds, graph theory Richard Heathfield <rjh@cpax.org.uk> - 2017-09-24 07:39 +0100
                Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-25 01:13 -0700
                Re: on cut edges and bonds, graph theory Richard Heathfield <rjh@cpax.org.uk> - 2017-09-25 09:46 +0100
                Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-25 21:38 -0700
                Re: on cut edges and bonds, graph theory Richard Heathfield <rjh@cpax.org.uk> - 2017-09-26 10:19 +0100
                Modern Trash William Elliot <marsh@panix.com> - 2017-09-26 03:37 -0700
                Re: Modern Trash David Brown <david.brown@hesbynett.no> - 2017-09-26 12:52 +0200
                Re: Modern Trash Richard Heathfield <rjh@cpax.org.uk> - 2017-09-26 23:10 +0100
                Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-24 22:33 +0100
                Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-25 01:08 -0700
                Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-25 20:44 +0100
                Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-25 21:36 -0700
                Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-26 12:04 +0100
                Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-26 23:15 -0700
                Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-27 12:52 +0100
                Re: on cut edges and bonds, graph theory William Elliot <marsh@panix.com> - 2017-09-27 19:55 -0700
                Re: on cut edges and bonds, graph theory Ike Naar <ike@iceland.freeshell.org> - 2017-09-24 16:55 +0000
        Re: on cut edges and bonds, graph theory David Brown <david.brown@hesbynett.no> - 2017-09-22 10:23 +0200
          Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-22 21:18 +0100
            Re: on cut edges and bonds, graph theory Daniel Bastos <dbastos@toledo.com> - 2017-09-23 08:48 -0300
            Re: on cut edges and bonds, graph theory David Brown <david.brown@hesbynett.no> - 2017-09-25 10:17 +0200
              Re: on cut edges and bonds, graph theory Daniel Bastos <dbastos@toledo.com> - 2017-09-25 07:31 -0300
                Re: on cut edges and bonds, graph theory David Brown <david.brown@hesbynett.no> - 2017-09-25 13:30 +0200
              Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-25 20:32 +0100
                Re: on cut edges and bonds, graph theory David Brown <david.brown@hesbynett.no> - 2017-09-26 10:12 +0200
                Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-26 11:53 +0100
                Re: on cut edges and bonds, graph theory David Brown <david.brown@hesbynett.no> - 2017-09-26 13:24 +0200
    Re: on cut edges and bonds, graph theory Daniel Bastos <dbastos@toledo.com> - 2017-09-19 16:21 -0300
      Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-20 17:43 +0100
        Re: on cut edges and bonds, graph theory Daniel Bastos <dbastos@toledo.com> - 2017-09-21 16:20 -0300
          Re: on cut edges and bonds, graph theory Daniel Bastos <dbastos@toledo.com> - 2017-09-21 17:52 -0300
          Re: on cut edges and bonds, graph theory Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-09-21 22:02 +0100
            Re: on cut edges and bonds, graph theory Daniel Bastos <dbastos@toledo.com> - 2017-09-23 13:42 -0300

csiph-web