[TUHS] Typesetting Mathematics by Kernighan and Cherry, retypeset

G. Branden Robinson g.branden.robinson at gmail.com
Sun Jul 3 03:15:31 AEST 2022

(For those on the TUHS list wondering about context, here it is.  I
"ported" the document in the Subject line to groff and re-typeset it,
discovering some spacing nits in groff and, apparently, a bug in AT&T
troff as well--one equation[1] in the sources not appearing in published
versions has risen from the grave when rendered with groff.

https://lists.gnu.org/archive/html/groff/2022-07/msg00002.html )

> On Sat, Jul 2, 2022 at 12:34 PM Douglas McIlroy <
> douglas.mcilroy at dartmouth.edu> wrote:
[Ingo Schwarze wrote:]
> > > I understand UNIX v7 is under this BSD-style license by Caldera
> > > Inc.  https://www.tuhs.org/Archive/Caldera-license.pdf
> >
> > The eqn document by Kernighan and Cherry also appears in the v10
> > manual, copyright by AT&T and published as a trade book. Wouldn't
> > the recent release of v10 also pertain to the manual?

At 2022-07-02T12:51:16-0400, Clem Cole wrote:
> If V10 was formally released, then yes - I would make that argument
> and feel free to say it to the judge.
> That said, did Caldera (and/or Nokia) officially release it or are
> they just 'not noticing' that it is available in the wild?
> I was under the impression that the only thing official is through V7.
> But all the other versions have 'leaked' and are widely available, and
> whoever owns that IP at this point, is not pursuing protection.   I am
> aware that Caldera ended up with rights of 'UNIX' - certainly through
> SVR5 -- and they released V1-V7 and 32V under their license (pointed
> too in the earlier message).  However, I am ownsnot aware of who
> formally owns V8-V10 (I would assume Caldera also but that IP might
> have stayed with Lucent then Nokia as part of that BTL IP transfer].
> Also, did Nokia 'formally' release Plan9 or Inferno -- is there a
> document like the Caldera one?

I believe even early releases of Plan 9 and Infero are both now fully
liberated, though the former[2] took much longer than the latter[3].

I'd offer my thanks to anyone who is keeping the Plan 9 and Inferno
flames lit.


[1] the last one in section 8, "e sup {i pi sup {rho +1}}"
[2] https://marc.info/?l=9fans&m=161650489113326
[3] https://www.vitanuova.com/inferno/licence.html
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