Team Coprin

Members
Overall Objectives
Scientific Foundations
Application Domains
Software
New Results
Contracts and Grants with Industry
Other Grants and Activities
Dissemination
Bibliography
Inria / Raweb 2004
Project: Coprin

Project : coprin

Section: Software


Keywords : constraints solving, optimization, symbolic computation, grid computing.

ALIAS

Participants : Jean-Pierre Merlet [correspondant], Gilles Chabert, David Daney, Yves Papegay.

The ALIAS library (Algorithms Library of Interval Analysis for Systems) is a collection of procedures based on interval analysis for systems solving and optimization. Its development has started in 1998.

ALIAS is constituted of two parts:

Our effort this year has focused on:

For dissemination purpose Y. Papegay has also written a web interface for two of our solvers. This on-line service, available since the end of September 2004, allows one to submit a set of up to 5 equations/inequalities to these solvers and to possibly get all the solutions of the system (see http://www-sop.inria.fr/coprin). Approximately 100 systems have been submitted in October 2004.

As mentioned previously our algorithms are well suited for a distributed implementation. The ALIAS-Maple interface already allows to use our algorithms in that way on a cluster by using the master-slaves paradigm and the message passing scheme PVM. But this paradigm is limited to a relatively small number of slaves. We have started a cooperation with the OASIS, APACHE and PARIS projects for using a grid-computing approach with as application example a difficult problem in quantum mechanic (see the corresponding section).

The current version of the ALIAS library is available through the Web page http://www-sop.inria.fr/coprin/logiciels/ALIAS.


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