Re: Numerical accuracy/precision - this is a bug or a feature?
- To: mathgroup at smc.vnet.net
- Subject: [mg120315] Re: Numerical accuracy/precision - this is a bug or a feature?
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Mon, 18 Jul 2011 06:15:11 -0400 (EDT)
On 7/17/11 at 6:02 AM, slawek at host.pl (slawek) wrote: >U==BFytkownik "Bill Rowe" <readnews at sbcglobal.net> napisa==B3 w >wiadomo==B6c== i grup dyskusyjnych:ivrmkn$866$1 at smc.vnet.net... >>SameQ requires exact correspondence between expressions, except >>that it still considers Real numbers equal if they differ in their >>last binary digit. >What for 1-digit numbers? 0 == 1 ? The example you show here has no relevance to the portion of the documentation for SameQ I copied since you use Equal and exact numbers. But if you were to replace the 1 with something that approximates a real with one binary digit and the 0 with a machine precision value, that is In:= 1.`0 === 0. Out= True which seems consistent with the documentation.