Plans for week 41

Dear all, included here you'll find the link to the first midterm (with deadline Sunday October 22. at midnight) and the plans for this week.
The midterm is at https://github.com/ManyBodyPhysics/FYS4480/blob/master/doc/Exercises/2023/FirstMidterm2023.pdf and is also attached here. 
Else, the plans for this week are
Topics to be covered
Thursday:
Repetition of derivation of Hartree-Fock theory
Stability of Hartree-Fock theory and Thouless theorem
Friday:
Koopman's theorem
Introduction to the homogenoeus electron gas in three dimensions
Work on first midterm Friday
Lecture Material: Lecture slides, handwritten notes, Szabo and Ostlund, chapter 3 and Shavitt and Bartlett chapters 3 and 4.

Best wishes to you all,
Morten and Stian