Re: Elisp manual, node "Comparison of Numbers"

[Lennart Borgman]

David Kastrup wrote:
> > > > >       
> > > > >           
> > > > The problem here is that fuzz is a _relative_ measure of equality, and
> > > > you employ it as an absolute measure here.  I don't think it a good
> > > > idea at all that 1e-12 and 0.995e-12 are considered different, while
> > > > 1e-8 and 0.0 are considered equal.
> > > >     
> > > >         
> > > Agree!
> > >   
> > >       
> > Hm. It is the relative distance from 0.
> >     
>
> It is merely the distance from 0, not the "relative distance".
>   
Yes, in a sense you are right. I should have expressed my self a bit 
differently, but I am afraid you missed the point. The crucial thing is 
that you divide the difference with the "distance" from 0 to construct 
the number you compare to the fuzz factor.

It seems reasonable to me but breaks down in the special case where one 
of the numbers are 0 (and the other is not).

Or am I missing something?