Path: csiph.com!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Ben Bacarisse Newsgroups: comp.programming,alt.algebra.help Subject: Re: on cut edges and bonds, graph theory Date: Sun, 24 Sep 2017 22:33:53 +0100 Organization: A noiseless patient Spider Lines: 24 Message-ID: <87o9pz3hoe.fsf@bsb.me.uk> References: <86wp4w3sz5.fsf@toledo.com> <87shfjpzgs.fsf@bsb.me.uk> <878thaq4ff.fsf@bsb.me.uk> <87efr17b3g.fsf@bsb.me.uk> <87fubgghsi.fsf@bsb.me.uk> <87k20qb3vy.fsf@bsb.me.uk> <87shfd4j8m.fsf@bsb.me.uk> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: reader02.eternal-september.org; posting-host="99b1aef6f3d5ab0af70dc2bcc7678a5d"; logging-data="21956"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18ADQQ9E3bELDROT29Xbirx0rufowLu0ks=" Cancel-Lock: sha1:hnUYxR0w17lRwqSPK2KlNjpWlpQ= sha1:hc3uIIDaqQuguX5SLHHDxGn6C1U= Xref: csiph.com comp.programming:8043 alt.algebra.help:5027 William Elliot writes: >> 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? I typed the Emacs command to insert a Unicode "COMBINING OVERLINE", a Unicode "UNION" and a Unicode "INTERSECTION" character. My Usenet client then decides on the most suitable encoding for the post which, in this case, had to be UTF-8. That decision is then announced by adding the appropriate header to the post. The sequences you see are how your local software chooses to display the UTF-8 encoding of the these characters. There is nothing proprietary about any of them. -- Ben.