IMO2025Q5
Timothy Gowers
IMO2025Q5
1:32:26
IMO2025Q4
Timothy Gowers
IMO2025Q4
1:46:49
A problem about finite Abelian groups
Timothy Gowers
A problem about finite Abelian groups
31:00
IMO2025Q1
Timothy Gowers
IMO2025Q1
1:03:37
A hard problem in elementary geometry VI
Timothy Gowers
A hard problem in elementary geometry VI
1:29:11
A hard problem in elementary geometry V
Timothy Gowers
A hard problem in elementary geometry V
36:00
A hard problem in elementary geometry IV
Timothy Gowers
A hard problem in elementary geometry IV
50:41
A hard problem in elementary geometry III
Timothy Gowers
A hard problem in elementary geometry III
42:01
A hard problem in elementary geometry: second attempt.
Timothy Gowers
A hard problem in elementary geometry: second attempt.
1:04:41
A hard problem in elementary geometry
Timothy Gowers
A hard problem in elementary geometry
1:04:47
Number theory problems
Timothy Gowers
Number theory problems
1:14:58
4. Colouring problem 16.
Timothy Gowers
4. Colouring problem 16.
51:23
3. Colouring questions 11-15.
Timothy Gowers
3. Colouring questions 11-15.
37:03
2. Colouring problems 7-10.
Timothy Gowers
2. Colouring problems 7-10.
48:07
1. Colouring problems 1-6 from Problem-Solving Strategies by Arthur Engel.
Timothy Gowers
1. Colouring problems 1-6 from Problem-Solving Strategies by Arthur Engel.
46:47
30. The last four invariants problems (numbers 57-60) solved.
Timothy Gowers
30. The last four invariants problems (numbers 57-60) solved.
34:44
29. Invariants problems 54-56.
Timothy Gowers
29. Invariants problems 54-56.
49:21
28. Problem 52 finally solved
Timothy Gowers
28. Problem 52 finally solved
1:09:39
27. Invariants problems 51-53 (with mistaken solution to 52)
Timothy Gowers
27. Invariants problems 51-53 (with mistaken solution to 52)
42:14
26. Invariants questions 45-50.
Timothy Gowers
26. Invariants questions 45-50.
42:55
25. Invariants problems 43 and 44
Timothy Gowers
25. Invariants problems 43 and 44
51:56
24. Problem 42 solved at last!
Timothy Gowers
24. Problem 42 solved at last!
6:52
23. A partial solution to Question 42.
Timothy Gowers
23. A partial solution to Question 42.
1:09:13
22. A brief failed attempt to salvage the argument for Q42.
Timothy Gowers
22. A brief failed attempt to salvage the argument for Q42.
19:59
21. Invariants problems 41 and 42 (second solved incorrectly).
Timothy Gowers
21. Invariants problems 41 and 42 (second solved incorrectly).
55:15
20. Invariants problem 40
Timothy Gowers
20. Invariants problem 40
40:49
19. An afterthought about question 39.
Timothy Gowers
19. An afterthought about question 39.
17:46
18. Invariants problems numbers 35-39.
Timothy Gowers
18. Invariants problems numbers 35-39.
34:06
17. Five more problems (numbers 30-34)
Timothy Gowers
17. Five more problems (numbers 30-34)
53:33
16. Invariants questions 27-29
Timothy Gowers
16. Invariants questions 27-29
59:31
15. Three more invariants problems (numbers 24-26)
Timothy Gowers
15. Three more invariants problems (numbers 24-26)
43:46
14. Three more invariants problems
Timothy Gowers
14. Three more invariants problems
48:09
13. Solving problems with invariants -- two more problems and a thought about the previous one.
Timothy Gowers
13. Solving problems with invariants -- two more problems and a thought about the previous one.
42:11
12. Solving problems with invariants -- one more problem
Timothy Gowers
12. Solving problems with invariants -- one more problem
51:31
11. Two more invariant problems
Timothy Gowers
11. Two more invariant problems
51:00
10. Solving problems with invariants --- three more questions
Timothy Gowers
10. Solving problems with invariants --- three more questions
49:57
9. Solving problems with invariants -- four more examples
Timothy Gowers
9. Solving problems with invariants -- four more examples
36:21
8. Solving problems with invariants -- the solution to the question I got stuck on.
Timothy Gowers
8. Solving problems with invariants -- the solution to the question I got stuck on.
19:09
7. In which I fail to solve problems about invariants
Timothy Gowers
7. In which I fail to solve problems about invariants
1:02:40
6. Problems that can be solved with the help of invariants
Timothy Gowers
6. Problems that can be solved with the help of invariants
1:03:16
5. Two unequal products -- afterthought
Timothy Gowers
5. Two unequal products -- afterthought
8:58
4. Two products that cannot be equal
Timothy Gowers
4. Two products that cannot be equal
32:37
3. Pascal's determinant III
Timothy Gowers
3. Pascal's determinant III
34:24
2. Pascal's determinant II
Timothy Gowers
2. Pascal's determinant II
1:03:10
1. A strange determinant
Timothy Gowers
1. A strange determinant
1:01:08