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Re: multiplicative inverse of 0.0

To: srfi-77@xxxxxxxxxxxxxxxxx
Subject: Re: multiplicative inverse of 0.0
From: Marcin 'Qrczak' Kowalczyk <qrczak@xxxxxxxxxx>
Date: Sat, 22 Oct 2005 20:21:26 +0200
Delivered-to: srfi-77@xxxxxxxxxxxxxxxxx
In-reply-to: <20051022175212.17A9F1B77BB@xxxxxxxxxxxxxxxxxxxxx> (Aubrey Jaffer's message of "Sat, 22 Oct 2005 13:52:12 -0400 (EDT)")
Mail-followup-to: srfi-77@xxxxxxxxxxxxxxxxx
References: <20051021145326.816C11B77BB@xxxxxxxxxxxxxxxxxxxxx> <20051021155906.GC16464@NYCMJCOWA2> <Pine.LNX.4.58.0510210910130.18969@xxxxxxxxxxxxxx> <20051022020312.GB5632@NYCMJCOWA2> <20051022175212.17A9F1B77BB@xxxxxxxxxxxxxxxxxxxxx>
Sender: Marcin 'Qrczak' Kowalczyk <qrczak@xxxxxxxxxx>
User-agent: Gnus/5.1006 (Gnus v5.10.6) Emacs/21.3 (gnu/linux)

Aubrey Jaffer <agj@xxxxxxxxxxxx> writes:

>  | (/ 0.0)                                ==>  +nan.0
>  | (/ 1.0 0)                              ==>  +inf.0
>  | (/ -1 0.0)                             ==>  -inf.0
>  | (/ +inf.0)                             ==>  0.0
>
> If 0.0 is the multiplicative inverse of +inf.0, then +inf.0 must be
> multiplicative inverse of 0.0.  But (/ 0.0) ==> +nan.0.  Which line is
> correct?

(/ 0.0) should be +inf.0.

-- 
   __("<         Marcin Kowalczyk
   \__/       qrczak@xxxxxxxxxx
    ^^     http://qrnik.knm.org.pl/~qrczak/

References:
- arithmetic issues
  - From: Aubrey Jaffer
- Re: arithmetic issues
  - From: John.Cowan
- Re: arithmetic issues
  - From: bear
- Re: arithmetic issues
  - From: John.Cowan
- multiplicative inverse of 0.0
  - From: Aubrey Jaffer

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