# Re: Possreps and numeric types

Date: Thu, 29 Mar 2007 09:31:59 -0700

Message-ID: <tbqn03hj20tjnt32ihpkot18t5hv71nvup_at_4ax.com>

Bob Badour <bbadour_at_pei.sympatico.ca> wrote:

>Gene Wirchenko wrote:

*>
**>> Bob Badour <bbadour_at_pei.sympatico.ca> wrote:
**>>
**>>>Gene Wirchenko wrote:
**>>>
**>>>>Bob Badour <bbadour_at_pei.sympatico.ca> wrote:
**>>>>
**>>>>[snip]
**>>>>
**>>>>>I admit I used epsilon somewhat sloppily and not necessarily with the
**>>>>>exact meaning used when discussing a particular floating-point
**>>>>>implementation. I used it to mean the distance to the representable
**>>>>>predecessor or successor of any representable rational value.
**>>>>
**>>>> That is incorrect. It is per
**>>>> http://en.wikipedia.org/wiki/Machine_epsilon
**>>>>In a floating-point system, epsilon is the smallest number such that
**>>>> 1 + epsilon > 1
**>>>>
**>>>>[snip]
**>>>
**>>>When you say the above is incorrect, are you saying I was not using
**>>>epsilon sloppily? Or are you saying I didn't use it to mean the distance
**>>>to the representable predecessor or successor of any representable
**>>>rational value?
**>>
**>> The definition of epsilon.
**>
**>Other than the "scaled by the exponent" bit, what exactly is the
**>difference? ie. If I subtracted one from the other, what answer would I get?
*

If I am understanding you, other than that difference, none. The answer would be garbage.

Sincerely,

Gene Wirchenko

Computerese Irregular Verb Conjugation:

I have preferences. You have biases. He/She has prejudices.Received on Thu Mar 29 2007 - 18:31:59 CEST