Path: ...!news.roellig-ltd.de!open-news-network.org!weretis.net!feeder8.news.weretis.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Thomas Koenig Newsgroups: comp.arch Subject: Re: Is Intel exceptionally unsuccessful as an architecture designer? Date: Tue, 24 Sep 2024 17:28:07 -0000 (UTC) Organization: A noiseless patient Spider Lines: 39 Message-ID: References: <2935676af968e40e7cad204d40cafdcf@www.novabbs.org> <2024Sep18.074007@mips.complang.tuwien.ac.at> <2024Sep18.220953@mips.complang.tuwien.ac.at> <20240922114808.000001f9@yahoo.com> <868qvj96lx.fsf@linuxsc.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Injection-Date: Tue, 24 Sep 2024 19:28:08 +0200 (CEST) Injection-Info: dont-email.me; posting-host="e4fc060bfe99b656beb5422538e16372"; logging-data="3459477"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18z0LcmaKsdX+tbyxa2+4zGz1ef1zLlNjU=" User-Agent: slrn/1.0.3 (Linux) Cancel-Lock: sha1:co4Aeh7CJwhc8BV4a3LD/1WQU2I= Bytes: 3789 David Brown schrieb: > On 24/09/2024 03:00, Lawrence D'Oliveiro wrote: >> On Mon, 23 Sep 2024 10:38:40 -0000 (UTC), Thomas Koenig wrote: >> >>> (Among thers, he left out turbulence, where we have some understanding, >>> but do not yet understand the Navier-Stokes equations - one of the >>> Millenium Problems). >> >> I thought the problem with Navier-Stokes is that it assumes >> infinitesimally-small particles of fluid, whereas we know that real fluids >> are made up of atoms and molecules. >> >> Remember how Max Planck solved the black-body problem? He knew all about >> the previous approach of assuming that matter was made up of little >> oscillators, and then trying to work out the limiting behaviour as the >> size of those oscillators approached zero -- that didn’t work. So his >> breakthrough was in assuming that the oscillators did *not* approach zero >> in size, but had some minimum nonzero size. Et voilà ... he got a curve >> that actually matched the known behaviour of radiating bodies. And laid >> one of the foundation stones of quantum theory in the process. >> >> Seems a similar thing could be done with Navier-Stokes ... ? > > Without knowing the history of work on Navier-Stokes, I am /reasonably/ > confident that mathematicians have thought about this and tried it. Quite a few decades ago, when I started my PhD, the group met at a pub. Also present was one former PhD student, who had his doctorate but, at the time, no job. When asked what he was doing, he said he currently was a privat scholar. A colleague asked for details, and he said that he was working on the general solution of the Navier-Stokes equation, and that he had tried separation of variables, but it didn't work. We took this as "shut up, I don't want to hear any more questions". Some time later, I tried to explain that to a medical doctor. I told here that it was like claiming he was searching for the cure for cancer, and that he had tried a saline solution, but it didn't work.