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+    //    EXAMPLE (PG 512)
+
+A = [1 2 1;2 2 3;-1 -3 0]                //    Coefficient matrix
+b = [0 3 2]'                             //    Right hand matrix 
+[l,u] = lu(A)
+    //    l is lower triangular matrix & u is upper triangular matrix
+l*u
+if(A==l*u)
+    disp('A = LU is verified')
+end
+det(A)
+det(u)
+if(det(A)==det(u))
+    disp('Determinant of A is equal to that of its upper triangular matrix')
+
+    //    Product rule of determinants is verified