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+// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+// Copyright (C) ????-2008 - INRIA
+//
+// This file must be used under the terms of the CeCILL.
+// This source file is licensed as described in the file COPYING, which
+// you should have received as part of this distribution.  The terms
+// are also available at
+// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
+
+
+function [Y,rk,Ac]=colcompr(A);
+    //[Y,rk,Ac]=colcompr(A);
+    //column compression of polynomial matrix A
+    //(left compression)
+    //Y = right unimodular base
+    //rk = normal rank of A
+    //Ac = A*Y
+    //see rowcompr
+    //!
+    [m,n]=size(A);
+    [Ac,Y,rk]=htrianr(A);
+endfunction