My comments Marcin 'Qrczak' Kowalczyk (19 Oct 2005 18:37 UTC)
Re: My comments Bradd W. Szonye (19 Oct 2005 19:17 UTC)
Re: My comments Thomas Bushnell BSG (19 Oct 2005 19:44 UTC)
Re: My comments Bradd W. Szonye (19 Oct 2005 19:55 UTC)
Re: My comments Thomas Bushnell BSG (19 Oct 2005 20:11 UTC)
Re: My comments John.Cowan (19 Oct 2005 20:10 UTC)
Re: My comments Thomas Bushnell BSG (19 Oct 2005 20:13 UTC)
Re: My comments Bradd W. Szonye (19 Oct 2005 20:25 UTC)
Re: My comments Marcin 'Qrczak' Kowalczyk (19 Oct 2005 20:23 UTC)
Re: My comments Bradd W. Szonye (19 Oct 2005 20:36 UTC)
Re: My comments Marcin 'Qrczak' Kowalczyk (19 Oct 2005 21:36 UTC)
Re: My comments Bradd W. Szonye (19 Oct 2005 21:42 UTC)
Re: My comments Bradd W. Szonye (19 Oct 2005 22:08 UTC)
Exactness (was Re: My comments) bear (20 Oct 2005 01:50 UTC)
Re: Exactness Thomas Bushnell BSG (20 Oct 2005 03:45 UTC)
Re: Exactness Marcin 'Qrczak' Kowalczyk (20 Oct 2005 09:13 UTC)
Re: Exactness Bradd W. Szonye (20 Oct 2005 20:15 UTC)
Re: Exactness bear (20 Oct 2005 22:09 UTC)
Re: Exactness Marcin 'Qrczak' Kowalczyk (21 Oct 2005 02:08 UTC)
Re: Exactness Thomas Bushnell BSG (21 Oct 2005 03:05 UTC)
Re: Exactness Marcin 'Qrczak' Kowalczyk (21 Oct 2005 08:15 UTC)
Re: Exactness Thomas Bushnell BSG (21 Oct 2005 18:38 UTC)
Re: Exactness Marcin 'Qrczak' Kowalczyk (21 Oct 2005 20:12 UTC)
Re: Exactness Thomas Bushnell BSG (21 Oct 2005 20:29 UTC)
Re: Exactness Marcin 'Qrczak' Kowalczyk (21 Oct 2005 20:38 UTC)
Re: Exactness Thomas Bushnell BSG (21 Oct 2005 20:44 UTC)
Re: Exactness Marcin 'Qrczak' Kowalczyk (21 Oct 2005 21:20 UTC)
Re: Exactness Thomas Bushnell BSG (21 Oct 2005 21:44 UTC)
Re: Exactness Marcin 'Qrczak' Kowalczyk (21 Oct 2005 22:18 UTC)
Re: Exactness Thomas Bushnell BSG (21 Oct 2005 22:48 UTC)
Re: Exactness Marcin 'Qrczak' Kowalczyk (22 Oct 2005 00:34 UTC)
Re: Exactness Thomas Bushnell BSG (22 Oct 2005 01:02 UTC)
Re: Exactness Per Bothner (22 Oct 2005 00:59 UTC)

Re: My comments Bradd W. Szonye 19 Oct 2005 20:36 UTC

Marcin 'Qrczak' Kowalczyk wrote:
> R5RS tries to make exactness an independent property from the value.
> IMHO it goes too far in allowing inexact arguments to certain
> operations.
>
> Let's consider R5RS operations defined on integers which might be
> inexact (I think these are all):
> A. odd? even? integer->char
> C. gcd lcm
> D. numerator denominator

Yes, these are problematic in that the answer is useless.

> B. quotient remainder modulo

But where's the problem here? The answer will necessarily be
approximate, but should still be useful. Consider the per capita income
of the USA in whole dollars, which is the quotient of two inexact
integers.

> In no case "an integer number, known exactly or not" or "a rational
> number, known exactly or not" is a sensible domain for an arithmetic
> function.

It's entirely reasonable for arithmetic functions like division and
addition. What's the total population of the EEC countries? What's the
density of carbon? These kinds of questions can be answered reasonably
and practically with inexact integers.
--
Bradd W. Szonye
http://www.szonye.com/bradd