Subject: Re: CCL:Routine TRED2

From: "William T. Winter" <[email-masked]>
Date: Mon, 5 Sep 1994 09:55:38 -0400 (EDT)

There are so many  versions of this procedure in use it is difficult to 
to be certain which one is under discussion.  Early versions of the 
Fortran codes for tred2 found in the EISPACK routines had a machine 
dependent variable MACHEP whose correct value was dependent upon the 
precision with which real numbers were stored.  Failure to correctly 
define the value of MACHEP certainly led to errors.  Current versions of 
TRED2 no longer have this variable. Instead they utilize machine independent
methods of assessing the precision.  
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Dr. William T. Winter                  Phone: (315)470-6876
315 Baker Lab                          FAX:   (315)470-6856
SUNY-ESF                               Internet: [email-masked]
Syracuse, NY 13210-2786