User contributions
- 02:35, 14 May 2015 (diff | hist) . . (+748) . . 2015 USAMO Problems (→Problem 6)
- 19:12, 13 May 2015 (diff | hist) . . (+1,955) . . 2015 USAMO Problems/Problem 3 (→Solution)
- 18:21, 13 May 2015 (diff | hist) . . (+181) . . 2015 USAMO Problems/Problem 3 (→Solution)
- 18:17, 13 May 2015 (diff | hist) . . (-695) . . 2015 USAMO Problems/Problem 3 (→Problem)
- 18:15, 13 May 2015 (diff | hist) . . (-968) . . 2015 USAMO Problems/Problem 3 (→Solution)
- 18:05, 13 May 2015 (diff | hist) . . (+44) . . 2015 USAMO Problems (→Problem 3)
- 19:28, 11 May 2015 (diff | hist) . . (+967) . . N 2015 USAMO Problems/Problem 3 (The key is to use symmetrical expressions in the quadratic forms (from distance conditions) to eliminate parameter t)
- 17:22, 11 May 2015 (diff | hist) . . (+571) . . N 2015 USAMO Problems/Problem 4 (Created page with "According to the given, f(x-a)+f(x+0.5a)=f(x-0.5a)+f(x), where x and a are rational. Likewise f(x-0.5a)+f(x+a)=f(x+0.5a)+f(x). Hence f(x+a)-f(x)= f(x)-f(x-a), namely 2f(x)=f(x...")
- 16:38, 11 May 2015 (diff | hist) . . (+1,512) . . N 2015 USAMO Problems/Problem 1 (Created page with "Let the set be {-1007, -1006, ...0,1,2...1006, 1007],namely all the consecutive integers from -1007 to 1007. Notice that the operation does not change the sum or the mean of ...")
