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NNTP-Posting-Date: Sat, 06 Aug 2011 23:32:33 -0500
Date: Sat, 06 Aug 2011 21:32:32 -0700
From: Patricia Shanahan <pats@acm.org>
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Subject: Re: higher precision doubles
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On 8/6/2011 4:34 PM, Jan Burse wrote:
> Patricia Shanahan schrieb:
>> What is your general strategy for dealing with rounding error in your
>
> The same strategy like ISO LIA is following. You have
> the mathematical definition of sin, pi, etc.. And then
> you have the machine objects SIN, PI, etc..
...

I was actually asking you what you were doing in your own program that
requires Math.sin(2*Math.PI) to be exactly 0, and how that requirement
fits with a general strategy for handling rounding error in your program.

The relevant standards for this are the Java Language Specification, for
the rounding rules, and the Java API, for the definition of Math.sin.
The IEEE 754 standard is useful background.

Patricia