- From: pat hayes <phayes@ai.uwf.edu>
- Date: Sat, 30 Nov 2002 21:57:20 -0600
- To: Jan Grant <Jan.Grant@bristol.ac.uk>
- Cc: w3c-rdfcore-wg@w3.org
>On 22 Nov 2002, Dan Connolly wrote: > >> I'm somewhat surprised by this (my impression was that the value >> space of float was a bunch of open intervals around rationals >> or something), but after checking a bunch of details, >> I'm convinced. > >They're always points; That is one account of what floats means, but there are others. I'm sure I recall one text from many years ago which defined floats in terms of intervals. Like I said, 'float'; isn't a mathematical term, and I don't think that there is a single definitive account of what exactly floats are supposed to mean. >just the operators have been changed. (Otherwise >it's hard to see how 1+1-1 = 1 with floats as open intervals.) Define + on intervals by (a,b) + (c,d) = (a+b,c+d) and subtraction similarly. Multiplication is a bit more complicated, admittedly. Pat -- --------------------------------------------------------------------- IHMC (850)434 8903 home 40 South Alcaniz St. (850)202 4416 office Pensacola (850)202 4440 fax FL 32501 (850)291 0667 cell phayes@ai.uwf.edu http://www.coginst.uwf.edu/~phayes s.pam@ai.uwf.edu for spam
Received on Saturday, 30 November 2002 23:53:36 UTC