Selected topics in combinatorics

Tutorials

Tutorial 1. (02.03.2023) - VC-dimension

Problems for the tutorial

We solved problems 1, 3, 4, and 6. Then we hand-waved the solution for problem 10.

Tutorial 2. (09.03.2023) - VC-dimension

Problems for the tutorial

We solved problems 1, 2, 3, and 5. We discussed how problems 5 and 7 relate to the fact that the field of reals is NIP.

Tutorial 3. (16.03.2023) - PAC-learning, VC-dimension, epsilon-nets

Problems for the tutorial

We solved problems 5, 6, and 7. Then we discussed the statement of problem 4.

Tutorial 4. (23.03.2023) - Neural nets, PAC-learning, transversals, packings

Problems for the tutorial

We solved problems 1, 2, 3, and 4.

Tutorial 5. (30.03.2023) - Transversals, packings, (p, q)-theorem

Problems for the tutorial

We solved problems 1, 2, 4, and 5.

Tutorial 6. (13.04.2023) - Sample compression schemes, minimax theorem, (p, q)-theorem

Problems for the tutorial

We solved problems 1, 2, 3, and (a more general version of) 4.

Tutorial 7. (20.04.2023) - Haussler’s packing theorem, Szemerédi-Trotter theorem

Problems for the tutorial

We solved problems 1, 5, 6, and 7.

Tutorial 8. (27.04.2023) - Matchings with low crossing number, cutting lemma, Haussler’s packing theorem

Problems for the tutorial

We solved all problems (form the sheet).

Tutorial 9. (09.05.2023) - Range minimum queries

We discussed different solutions to the RMQ problem by following [Presentation 1] and [Presentation 2].

Tutorial 10. (11.05.2023) - Range minimum queires, Szemerédi regularity lemma

Problems for the tutorial

We solved problems 1, 3, 4, 5, 6, and 7.

Tutorial 11. (18.05.2023) - Szemerédi regularity lemma, property testing

Problems for the tutorial

We solved problems 1, 2, 6, 7, and 8.

Tutorial 12. (25.05.2023) - Introduction to discrepancy

I was absent and the replacement was done by dr. Kunal Dutta.

Tutorial 13. (01.06.2023) - Stability

Problems for the tutorial

We solved problems 1, 2, 3, 4, 5, and 6.

Tutorial 14. (15.06.2023) - Permutations

Problems for the tutorial

We solved problems 1, 2, 3, 4, 5, and 6.