bill's blog

18 Sep, 2025 Writeup: Putnam 2012 A1
20 Jul, 2025 Writeup: Putnam 2007 B1
19 Jul, 2025 Writeup: Putnam 2007 A3
19 Jul, 2025 Writeup: Putnam 2007 A2
19 Jul, 2025 Writeup: Putnam 2007 A1
21 Jun, 2025 Writeup: IMO 2004 Shortlist A4
12 Jun, 2025 Tracing Particles under Vacuum Assumptions
07 Jun, 2025 Writeup: IMO 2004 Shortlist C1
03 Jun, 2025 Writeup: IMO 2004 SL A2
29 Apr, 2025 Writeup: IMO Shortlist 2002 C2
29 Apr, 2025 Writeup: IMO Shortlist 2002 N2
28 Apr, 2025 Writeup: IMO Shortlist 2002 N1
25 Apr, 2025 Writeup: IMO Shortlist 2001 C5
23 Apr, 2025 Writeup: 2025 USAPhO A1
20 Apr, 2025 Writeup: IMO Shortlist 2001 C2
19 Apr, 2025 Writeup: IMO Shortlist 2001 C1
19 Apr, 2025 Writeup: IMO Shortlist 2001 A1