Big float Round off errors

• Subject: Big float Round off errors
• From: Richard Hennessy
• Date: Tue, 6 May 2008 03:40:18 -0400

"Floating-point operations are not exact, but they can be modeled as:
fl( x op y ) = (1+D) (x op y)
where |D| <= u, u is the unit round off or machine precision"

I found this on the Internet and it is about running error analysis for numerical algorithms.  I just want to know the value of u for big floats as a function of fpprec (as opposed to machine precision) since Maxima big floats are running in a virtual machine?  Does anyone know how round off is handled with big floats.

Thanks,

Rich

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