Thank u for the good lecture. I have a question: you set the lambda to be greater than or equal to zero but in the calculus textbook it does not have that kind of lambda constraint. However, when I study Linear Regression Analysis I need to have your lambda condition for calculating Ridge Regression Estimator. Why do you have this constraint? If your constraint is right, then should the lambda be less than or equal to zero when minimizing instead of maximizing? thank you.
