tailoff.h File Reference

tailing off manager. More...

#include "abacus/ring.h"

Go to the source code of this file.

Classes
class	ABA_TAILOFF
	This class stores the history of the values of the last LP-solutions and implements all functions to control tailing-off effect. More...

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Detailed Description

tailing off manager.

Author:

Matthias Elf

During the cutting plane phase of the optimization of a single subproblem it can be quite often observed that during the first iterations a significant decrease of the optimum value of the LP occurs, yet, this decrease becomes smaller and smaller in later iterations. This effect is called { tailing off\/} ({PR91}). Experimental results show that it might be better to branch, although violated constraints can still be generated, than to continue the cutting plane phase. This class stores the history of the values of the last LP-solutions and implements all functions to control this tailing-off effect. The parameters are taken from the associated master.

License:

This file is part of ABACUS - A Branch And CUt System Copyright (C) 1995 - 2003 University of Cologne, Germany

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

See also:

http://www.gnu.org/copyleft/gpl.html

Id

tailoff.h,v 2.3 2007/07/03 09:50:44 baumann Exp

Definition in file tailoff.h.

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