diff -r b2dfd32b4895 -r 173b53b28d7c lemon/lp_base.h
--- a/lemon/lp_base.h	Wed Nov 30 13:24:37 2005 +0000
+++ b/lemon/lp_base.h	Wed Nov 30 17:00:17 2005 +0000
@@ -595,6 +595,7 @@
     virtual Value _getPrimal(int i) = 0;
     virtual Value _getDual(int i) = 0;
     virtual Value _getPrimalValue() = 0;
+    virtual bool _isBasicCol(int i) = 0;
     virtual SolutionStatus _getPrimalStatus() = 0;
     virtual SolutionStatus _getDualStatus() = 0;
     ///\todo This could be implemented here, too, using _getPrimalStatus() and
@@ -1000,6 +1001,9 @@
     Value dual(Row r) { return _getDual(rows.floatingId(r.id)); }
 
     ///\e
+    bool isBasicCol(Col c) { return _isBasicCol(cols.floatingId(c.id)); }
+
+    ///\e
 
     ///\return
     ///- \ref INF or -\ref INF means either infeasibility or unboundedness