Re: Re: Re: Bug in 5.1??

*To*: mathgroup at smc.vnet.net*Subject*: [mg54568] Re: [mg54528] Re: [mg54469] Re: Bug in 5.1??*From*: Andrzej Kozlowski <akozlowski at gmail.com>*Date*: Wed, 23 Feb 2005 03:11:38 -0500 (EST)*References*: <200502210844.DAA27157@smc.vnet.net> <200502220923.EAA10793@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Your response is very curious. Who told you you are not supposed to complain? I suggested you file a bug report. If you do not file one presumably you have a reason?? Is the reason that (you imagine) I told you not to complain? I am flattered to see that I now wield this sort of authority but really I do not seek it. I only told you that in the past people wrote write about such issues and, in the old days, someone (usually David Withoff) would respond. But even he never gave, as far as I can recall, a clear reason why this happens, only a vague one like the one I have given: strange things happen if you use significance arithmetic at low precision,and try making comparisons like 10`2 ==0 True or 100`2==0 True or whatever. Don't do it. So now please do file a bug report and demand an explanation. I will be very interested to read the response, if you get one of course. After all, I am just another user and have no better access to WRI's thinking than you have. Andrzej Kozlowski On 22 Feb 2005, at 10:23, DrBob wrote: > It doesn't make sense to ANYBODY, as far as I can tell. > > But we're not supposed to complain, because somebody ALREADY > complained (some time or another). > > Bobby > > On Mon, 21 Feb 2005 03:44:38 -0500 (EST), Dana DeLouis > <delouis at bellsouth.net> wrote: > >> Seems to me that the loss of precision returns an "Interval", which >> is still >> greater than zero. It looks like the cutoff between True & False is >> a hair >> above -1, which doesn't make sense to me either. >> >> Interval[N[5, 2]] >> Interval[{4.9, 5.1}] >> >> N[5, 2] > -1 >> True >> >> N[5, 2] > -1 + $MachineEpsilon >> False >> > > > > -- > DrBob at bigfoot.com > www.eclecticdreams.net > >

**References**:**Re: Bug in 5.1??***From:*"Dana DeLouis" <delouis@bellsouth.net>

**Re: Re: Bug in 5.1??***From:*DrBob <drbob@bigfoot.com>