/*

     This file is part of Combean.

     Combean is free software; you can redistribute it and/or modify

     it under the terms of the GNU General Public License as published by

     the Free Software Foundation; either version 2 of the License, or

     (at your option) any later version.

     Combean 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 General Public License for more details.

     You should have received a copy of the GNU General Public License

     along with Combean; if not, write to the Free Software

     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

 /*

  * Created on 22.04.2005

  *

  */

 package net.sourceforge.combean.interfaces.mathprog.lp;

 import net.sourceforge.combean.interfaces.base.NamedObject;

 /**

  * A variable in an LP, with a coefficient and an interval of admissible

  * values (i.e. a box constraint).

  * 

  * @author schickin

  *

  */

 public interface LPVariable extends NamedObject {

     /**

      * Get coefficient of the variable.

      * 

      * @return coefficient of the variable.

      */

     public double getCoeff();

     /**

      * Get lower bound of interval of admissible values for variable.

      * 

      * @return lower bound of box constraint.

      */

     public double getLowerBound();

     /**

      * Get upper bound of interval of admissible values for variable.

      * 

      * @return upper bound of box constraint.

      */

     public double getUpperBound();

 }