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18.217 Notes

18.217 Fall 2024: Combinatorics and Geometry

Notes will be added as lectures occur. If you catch typos or errors let me know and I can add comments underneath with corrections.

Lecture 1. Wed 9/4 (Not Mon; it says the wrong weekday at the top)Download
Lecture 2. Fri 9/6Download
Lecture 3. Mon 9/9 (Note: f_i(P) = number of i-dimensional faces of P)Download
Lecture 4. Wed 9/11Download
Lecture 5. Fri 9/13Download
Lecture 6. Mon 9/16Download
Lecture 7. Wed 9/18Download
Lecture 8. Mon 9/23Download
Lecture 9. Wed 9/25Download
Lecture 10. Fri 9/27Download
Lecture 11. Mon 9/30Download
Lecture 12. Wed 10/2Download
Lecture 13. Fri 10/4Download
Lecture 14. Mon 10/7Download
Lecture 15. Wed 10/9
Download
Lecture 16. Fri 10/11Download
Lecture 17. Wed 10/16Download
Lecture 18. Fri 10/18Download
Lecture 19. Mon 10/21Download

Lecture 20. Wed 10/22: Problem set presentations. No notes, sorry

Lecture 21. Fri 10/25Download
Lecture 22. Mon 10/18Download
Lecture 23. Wed 10/30Download
Lecture 25. Mon 11/4Download
Lecture 26. Wed 11/6Download
Lecture27. Fri 11/8Download
Lecture28. Wed 11/13Download
Lecture29. Fri 11/15Download
Lecture 30. Mon 11/18: Guest lectures from some of Prof. Postnikov’s students, including me!Download

Lectures 31&32 guest lectures by Colin Defant. Given from powerpoint, so no written notes.

Lecture 33. Mon 11/25Download
Lecture 35. Mon 12/2Download
Lecture 36. Wed 12/4Download

Previous semesters of 18.217 notes

One day I’ll get around to uploading these too. The main priority to start is making sure current lectures are uploaded as they occur so people taking the class now can reference them, but eventually you’ll be able to find old lectures from Fall 2022 and 2023 here as well