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+        //    PG 599
+
+    //    e = 0.001
+    //    From earlier example : 
+    //    eigen values of matrix A are 1 and 2. So,..
+
+    //    inv(P)*A*P = [1 0;0 2]
+
+A = [101 -90;110 -98]
+B = [-1 -1;0 0]
+    //    From the above equation, we get:
+
+P = [9/sqrt(181) -10/sqrt(221);10/sqrt(181) -11/sqrt(221)]
+inv(P)
+K = norm(P)*norm(inv(P))        //    K is condition number
+u1 = P(:,1)
+u2 = P(:,2)
+Q = inv(P)
+R = Q'
+w1 = R(:,1)
+w2 = R(:,2)
+s1 = 1/norm(w1,2)
+norm(B)
+
+//    abs(lam1(e) - lam1) <= sqrt(2)*e/0.005 + O(e^2) = 283*e + O(e^2)