help-octave
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Negative zeros?


From: Stefan van der Walt
Subject: Re: Negative zeros?
Date: Wed, 14 Sep 2005 12:08:12 +0200
User-agent: Mutt/1.5.9i

On Tue, Sep 13, 2005 at 08:17:07PM -0400, Vic Norton wrote:
> >"Branch Cuts for Complex Elementary Functions, or Much Ado About
> >Nothing's Sign Bit" by William Kahan in "The State of the Art in
> >Numerical Analysis", (eds. Iserles and Powell), Clarendon Press,
> >Oxford, 1987.
> >
> >However, he has many other interesting writings pertaining to
> >Floating-Point on his webpage at
> >
> >http://www.cs.berkeley.edu/~wkahan/
> >
> >(like "Matlab's Loss is Nobody's Gain" and "How Java's Floating-Point
> >hurts Everyone Everywhere").
> 
> I am sorry, John, David, and Stephan. I am a mathematician. I don't 
> choose to read nonsense. Zero is zero is zero.

Kahan's work is simply an analysis of a (very useful) model.

Thought you'd enjoy this one:

    (-a) = (-a) + 0
    (-a) = (-a) + 0a
    (-a) = (-a) + (1 + (-1))a
    (-a) = (-a) + (1a + (-1)a)
    (-a) = (-a) + (a + (-1)a)
    (-a) = ((-a) + a) + (-1)a
    (-a) = 0 + (-1)a
    (-a) = (-1)a

Regards
Stéfan



-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------



reply via email to

[Prev in Thread] Current Thread [Next in Thread]