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(DF(A))(B)= d/dt F(A+tB) = d/dt (A+tB)(A+tB)* = d/dt (A+tB)(A*+tB*) =

d/dt(AA*+t(AB*+BA*)+t^2 BB*)| = AB*+BA*

Now set A = I.

Pages 35 and 36 are removed.

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Problem 4.c was not correct. The new version of that with solution is also

uploaded. You do not lose point for this problem.