*****************************************************************
*								*
*  REGAL 3.2 (includes GUI) is developed by:			*
*								*
*	Attilio Giordana and Filippo Neri  			*
*								*
*	Universita` di Torino,					*
*	Dipartimento di Informatica,				*
*	C.so Svizzera 185, 10149, Torino, Italy			*
*								*
*	e-mail: {attilio, neri}@di.unito.it			*
*       http://www.di.unito.it/~attilio/         		*
*       http://www.di.unito.it/~neri/         			*
*	Phone: (+39) 11 7429215, FAX: (+39) 11 751603		*
*								*
*****************************************************************
  
REGAL is a distributed genetic algorithm-based system, designed 
for learning First Order Logic concept descriptions from examples. 

REGAL is based on a selection operator, called Universal Suffrage
operator, provably allowing the population to asymptotically  
converge, in average, to an equilibrium state, in which several
species coexist. 

The system is a hybrid between the Pittsburgh and the Michigan
approaches, as the population constitutes a redundant set of 
partial concept descriptions, each evolved separately.

The system proved to be particularly robust with respect to
parameter setting across a variety of different application domains.

This version of REGAL is provided with graphical user interface.

Bibliography

Giordana  A.  and Saitta L. (1993). "REGAL: An Integrated
   System    for   Learning   Relations   Using   Genetic
   Algorithms".  Proc.  2nd  International  Workshop   on
   Multistrategy Learning  (Harpers Ferry, VA), pp.  234-
   249.
Giordana  A.  and Saitta L. (1994). "Learning Disjunctive
   Concepts  by Means of Genetic Algorithms". Proc.  Int.
   Conf.  on  Machine Learning  (New Brunswick, NJ),  pp.
   96-104.
Giordana A., Neri F. and Saitta L. (1994). "Formal Models
   of  Selection in Genetic Algorithms". Proc. Int. Conf.
   on  Methodologies for Intelligent Systems  (Charlotte,
   NC), pp. 124-133.
Neri  F.  and Giordana A. (1995). "A Distributed  Genetic
   Algorithm for Concept Learning", Proc. Int.  Conf.  on
   Genetic Algorithms  (Pittsburgh, PA), pp. 436-443.
Neri  F.  and  Saitta L. (1995). "A Formal  Analysis  of
   Selection  Schemes".  Proc.  Int.  Conf.  on   Genetic
   Algorithms  (Pittsburgh,PA), pp. 32-39.
Giordana A. and Neri F. (1996). "Search-Intensive Concept
   Induction". To appear on Evolutionary Computaion 
   Journal, vol. 3, n. 4.
Neri F. and  Saitta L. (1996). "An Analysis of the 
   Universal Suffrage selection Operator". To appear on 
   Evolutionary Computaion Journal, vol. 4, n. 1.
 

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                              NOTICE

 Copyright (c) 1996 by Attilio Giordana and Filippo Neri 
 Use copying and distributing permitted for educational and 
 research purposes. All other rights reserved.

 Neither the Institutions (Universita` di Torino, Dipartimento di
 Informatica) nor the Authors make any representations about the 
 suitability of this software for any purpose. This software is
 provided ``as is'' without express or implied warranty.

*********************************************************

	FOR THE INSTALLATION OF REGAL  
	PLEASE READ THE FILE README.INSTALL 

*********************************************************

	FOR INFORMATION ON USING THE SYSTEM
	PLEASE READ THE FILE doc/regal_intro

*********************************************************
*							*
*      FOR STATISTICAL RECORD,				*
*							*
*      IF YOU USE REGAL 3.2, PLEASE E-MAIL AT		*
*							*
*       	neri@di.unito.it			*
*							*
*       	attilio@di.unito.it			*
*   							*	
*********************************************************

                      ACKNOWLEDGEMENTS:

This Package use the following public domain software tools:

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
         PVM version 3.3:  Parallel Virtual Machine System
               University of Tennessee, Knoxville TN.
           Oak Ridge National Laboratory, Oak Ridge TN.
                   Emory University, Atlanta GA.
      Authors:  A. L. Beguelin, J. J. Dongarra, G. A. Geist,
    W. C. Jiang, R. J. Manchek, B. K. Moore, and V. S. Sunderam
                   (C) 1992 All Rights Reserved
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
			Tcl and Tk
	  	    by John Ousterhout
	    University of California at Berkeley
		   ouster@cs.berkeley.edu

               Package Versions: tcl7.3, tk3.6 
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

                  blt (extension to Tk toolkit)
           Hypertext widget created by George Howlett.
                     Package Version: blt-1.7
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++