diff --git a/eo/src/eo b/eo/src/eo
index 325572d4..3c07b82c 100644
--- a/eo/src/eo
+++ b/eo/src/eo
@@ -61,7 +61,12 @@
 // combinations of simple eoOps (eoMonOp and eoQuadOp)
 #include <eoProportionalCombinedOp.h>
 // didactic (mimics SGA-like variation into an eoGenOp)
+// calls crossover and mutation sequentially, 
+// with their respective mutation rates
 #include <eoSGAGenOp.h>
+// its dual: crossover, mutation (and copy) - proportional choice
+// w.r.t. given relative weights
+#include <eoPropGAGenOp.h>
 
 // population
 #include <eoPop.h>
diff --git a/eo/src/eoPropGAGenOp.h b/eo/src/eoPropGAGenOp.h
new file mode 100644
index 00000000..e4305e29
--- /dev/null
+++ b/eo/src/eoPropGAGenOp.h
@@ -0,0 +1,87 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoPropGAGenOp.h
+// (c) Marc.Schoenauer 2005
+/*
+    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 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
+
+    Contact: todos@geneura.ugr.es, http://geneura.ugr.es
+             Marc.Schoenauer@inria.fr
+             mak@dhi.dk
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef _eoPropGAGenOp_h
+#define _eoPropGAGenOp_h
+
+#include "eoGenOp.h"
+#include "eoInvalidateOps.h"
+///////////////////////////////////////////////////////////////////////////////
+// class eoSGAGenOp
+///////////////////////////////////////////////////////////////////////////////
+
+/** ***************************************************************************
+ * eoPropGAGenOp (for Simple GA, but Proportional) 
+ * choice between Crossover, mutation or cloining 
+ * with respect to given relatve weights
+ *****************************************************************************/
+template<class EOT> 
+class eoPropGAGenOp : public eoGenOp<EOT>
+{
+ public:
+    
+  /** Ctor from 
+   *   * weight of clone
+   *   * crossover (with weight)
+   *   * mutation (with weight)
+   */
+  eoPropGAGenOp(double _wClone, eoQuadOp<EOT>& _cross, double _wCross, 
+		 eoMonOp<EOT>& _mut, double _wMut)
+    : wClone(_wClone),
+      cross(_cross),
+      wCross(_wCross),
+      mut(_mut), 
+      wMut(_wMut) 
+  {
+    propOp.add(cross, wCross); // the crossover - with weight wCross
+    propOp.add(mut, wMut); // mutation with weight wMut
+    propOp.add(monClone, wClone);
+  }
+  
+  /** do the job: delegate to op */
+  virtual void apply(eoPopulator<EOT>& _pop)
+  {
+    propOp.apply(_pop);
+  }
+
+  /** inherited from eoGenOp */
+  virtual unsigned max_production(void) {return 2;}
+
+  virtual std::string className() const {return "eoPropGAGenOp";}
+
+
+ private:
+  double wClone;
+  eoQuadOp<EOT> &cross;   // eoInvalidateXXX take the boolean output
+  double wCross;
+  eoMonOp<EOT> & mut;      // of the XXX op and invalidate the EOT
+  double wMut;
+  eoProportionalOp<EOT> propOp;
+  eoMonCloneOp<EOT> monClone;
+};
+
+
+#endif