1. Full score of hw#1 has been given to all students submitted due to the problem set mismatch.

2. Additional hw#3: two more problems in the lecture note 4-2 are added. 

3. The midterm exam will be given on April 29, 2020. Details will be announced soon.

    --> Midterm exam will be an open book test, but under the web-camera turned on.

          If you do not provide the video-on environment, let me know as early as possible.