From pycyn@aol.com Wed Jun 13 12:09:43 2001 Return-Path: X-Sender: Pycyn@aol.com X-Apparently-To: lojban@yahoogroups.com Received: (EGP: mail-7_1_3); 13 Jun 2001 19:09:43 -0000 Received: (qmail 34533 invoked from network); 13 Jun 2001 19:03:57 -0000 Received: from unknown (10.1.10.142) by l10.egroups.com with QMQP; 13 Jun 2001 19:03:57 -0000 Received: from unknown (HELO imo-d08.mx.aol.com) (205.188.157.40) by mta3 with SMTP; 13 Jun 2001 19:03:57 -0000 Received: from Pycyn@aol.com by imo-d08.mx.aol.com (mail_out_v30.22.) id r.40.cc2c01b (3985) for ; Wed, 13 Jun 2001 15:03:54 -0400 (EDT) Message-ID: <40.cc2c01b.2859131a@aol.com> Date: Wed, 13 Jun 2001 15:03:54 EDT Subject: Re: [lojban] Sapir-Whorf Hypothesis To: lojban@yahoogroups.com MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_40.cc2c01b.2859131a_boundary" X-Mailer: AOL 6.0 for Windows US sub 10519 From: pycyn@aol.com --part1_40.cc2c01b.2859131a_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 6/12/2001 7:43:31 PM Central Daylight Time, njs@uclink4.berkeley.edu writes: > I don't know much about Robinson's infinitesmals; they're interesting > partly because he (and others) went through and redeveloped a whole > theory of calculus and analysis where dx/dy really does mean dividing > It's been forty years since I had that class with Robinson. As I recall, you got the models by infinite copies of the number system ordered like the negative integers or some such thing. Details float back from time to time, but not the connected whole. --part1_40.cc2c01b.2859131a_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 6/12/2001 7:43:31 PM Central Daylight Time,
njs@uclink4.berkeley.edu writes:


I don't know much about Robinson's infinitesmals; they're interesting
partly because he (and others) went through and redeveloped a whole
theory of calculus and analysis where dx/dy really does mean dividing
an infinitesmal by another infinitesmal... the book at hand mentions:


It's been forty years since I had that class with Robinson.  As I recall, you
got the models by infinite copies of the number system ordered like the
negative integers or some such thing.  Details float back from time to time,
but not the connected whole. --part1_40.cc2c01b.2859131a_boundary--