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[Help-smalltalk] Re: [bug] FloatQ pi is not the extended precision neare


From: Paolo Bonzini
Subject: [Help-smalltalk] Re: [bug] FloatQ pi is not the extended precision nearest pi
Date: Mon, 15 Jun 2009 05:45:22 -0700

Issue status update for http://smalltalk.gnu.org/project/issue/312 Post a follow up: http://smalltalk.gnu.org/project/comments/add/312

Project:      GNU Smalltalk
Version:      <none>
Component:    Base classes
Category:     bug reports
Priority:     normal
Assigned to:  Unassigned
Reported by:  nice
Updated by:   bonzinip
-Status:       active
+Status:       fixed

I fixed this by using base-16 constants.

Note that while comparing /FloatX pi abs/ works for sine, it does not
necessarily work where the derivative is not close to 1.  For example
an approximation /L'/ to /ln 10/ from the right may be better than a
second approximation /L''/ from the left, and yet /|eL'-10|/ can be
greater than /|eL''-10|/.






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