George Woltman wrote: > At 02:46 AM 12/4/2006, Brian Beesley wrote: > >In any case > >a detected roundoff error of 0.5 cannot be reliably recovered from as it's > >impossible to guess accurately whether the correct integer is the "floor" or > >the "ceiling". > > Actually, prime95 recovers from roundoff errors up to 0.6 (by redoing the > iteration using a safer, but 3 times slower, method).
Or you could "shift it"? > > I think Brian is trying to say that if you do no roundoff error detection and > recovery, then a program cannot recover from a roundoff error above 0.5. The more I hear of your antics to avoid roundoff errors, the more I feel you are on a doomed quest for Maxwell's Demon or such :-) David Eddy _________________________________________________________________ Be one of the first to try Windows Live Mail. http://ideas.live.com/programpage.aspx?versionId=5d21c51a-b161-4314-9b0e-4911fb2b2e6d _______________________________________________ Prime mailing list [email protected] http://hogranch.com/mailman/listinfo/prime
