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Re: IEEE standard for interval arithmetic approved

From: Alexander Barth
Subject: Re: IEEE standard for interval arithmetic approved
Date: Fri, 12 Jun 2015 10:25:48 +0200

Dear Oliver,

Thank you providing this package! I have to say, that I was not aware of interval arithmetic before and I think that it can be a very useful way to describe the uncertainties of e.g. models.

I have just a basic questions about discontinuous functions. For example tan:

>> tan(infsup(1.4,1.7))
ans = [Entire]

I would expect [tan(1.4), ∞[ ∪ ]-∞, tan(1.7)]. Does the interval arithmetic reduce the results always to a simple interval?

I any case, thank you for sharing your work!

On Fri, Jun 12, 2015 at 9:33 AM, Marco Atzeri <address@hidden> wrote:
On 6/12/2015 7:35 AM, Oliver Heimlich wrote:

I am happy to announce that IEEE 1788, the standard for interval
arithmetic, was approved as a new standard on June 11. It will remain
active for ten years.

The standard document will soon be published, probably within the next

AFAIK, Octave has the first complete implementation which is conforming
to this standard. If you ever wanted to examine interval arithmetic—now
is the time! You can get the interval package from Octave Forge [1].

The current version is already feature complete, but a version 1.0.0 of
the interval package will be released soon, to reflect this important
milestone. I recommend to also include the upcoming version in mxe
builds of Octave or any downstream distributions.

The interval package will also be presented during OctConf 2015 [2].


[1] http://octave.sourceforge.net/interval/

Dear Oliver,
I saw a lot of changes on

in comparison to the current 0.2.1 package.
May I suggest at least a  0.2.2 release ?

In addition please put a COPYING file on the main dir;
exporting the mercurial source in a tar.gz file and building/installing
from that file is failing as a COPYING is expected.


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