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| Related articles |
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| Is infinity equal to infinity? erikr@iar.se (Erik Runeson) (1998-07-08) |
| Re: Is infinity equal to infinity? vosse@RULS41.FSW.LEIDENUNIV.NL (1998-07-10) |
| Re: Is infinity equal to infinity? rwhutch@nr.infi.net (1998-07-10) |
| Re: Is infinity equal to infinity? fis@mpi-sb.mpg.de (Matthias Fischmann) (1998-07-10) |
| Re: Is infinity equal to infinity? john_mitchell@intuit.com (John Mitchell) (1998-07-10) |
| Re: Is infinity equal to infinity? joachim.durchholz@munich.netsurf.de (Joachim Durchholz) (1998-07-10) |
| Re: Is infinity equal to infinity? bear@sonic.net (Ray Dillinger) (1998-07-11) |
| Re: Is infinity equal to infinity? Kevin@quitt.net (1998-07-11) |
| Re: Is infinity equal to infinity? dwcantrell@aol.com (1998-07-13) |
| Re: Is infinity equal to infinity? dwcantrell@aol.com (1998-07-13) |
| Re: Is infinity equal to infinity? henry@spsystems.net (1998-07-13) |
| Re: Is infinity equal to infinity? erikr@iar.se (Erik Runeson) (1998-07-20) |
| Re: Is infinity equal to infinity? larry.jones@sdrc.com (Larry Jones) (1998-07-20) |
| [6 later articles] |
| From: | Ray Dillinger <bear@sonic.net> |
| Newsgroups: | sci.math.num-analysis,comp.lang.c,sci.math,comp.compilers |
| Date: | 11 Jul 1998 23:42:02 -0400 |
| Organization: | Cognitive Dissidents |
| Distribution: | inet |
| References: | 98-07-058 |
| Keywords: | arithmetic, design, comment |
Erik Runeson wrote:
> Inf == Inf ?
> Inf - Inf = NaN
> Any comparison with a NaN (Not a number) shall, according to the IEEE
> 754 be concidered unordered and return false.
The need to have return values for comparisons like inf=inf is perhaps
the best argument I've ever seen for NaB (Not a Boolean) as a
necessary part of a programming language.
[The IEEE floating point standard does say that some comparisons return
"unordered" as well as true or false. -John]
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