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On Thu, 22 Apr 2010 12:34:54 +0300, Arnold Neumaier
<Arnold.Neumaier@xxxxxxxxxxxx> wrote:
Siegfried M. Rump wrote:
I made a design decision that there are no empty intervals in INTLAB any
more. To take care of infinite intervals, NaNs and empty intervals, in
particular for dense and sparse matrices having entries with
combinations
of these, slows down all computations.
The new interpretation of a NaN is "don't know", no verified
information
available.
Does that mean that infinite intervals have been exorcized, too?
Sorry, I didn't say: No, infinite intervals are there as
before, only empty intervals are killed.
Best wishes
Siegfried
--
=====================================================
Prof. Dr. Siegfried M. Rump
Institute for Reliable Computing
Hamburg University of Technology
Schwarzenbergstr. 95
21071 Hamburg
Germany
phone +49 40 42878 3027
fax +49 40 42878 2489
http://www.ti3.tu-harburg.de
and
Visiting Professor at Waseda University
Faculty of Science and Engineering
Shinjuku Lambdax Bldg. 902
2-4-12 Okubo, Shinjuku-ku
Tokyo 169-0072
Japan
phone/fax in Japan +81 3 5286 3414
and
Visiting Professor at
Université Pierre et Marie Curie (Paris 6)
Laboratoire LIP6
Département Calcul Scientifique
4 place Jussieu
75252 Paris cedex 05
France
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