User contributions
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- 20:56, 18 August 2012 (diff | hist) . . (0) . . m AoPS Wiki:Competition ratings (eg vs ie)
- 13:02, 22 July 2012 (diff | hist) . . (+2) . . 2011 IMO Problems/Problem 4 (→Solution)
- 11:13, 22 July 2012 (diff | hist) . . (+53) . . 2011 IMO Problems/Problem 4 (→Solution)
- 11:11, 22 July 2012 (diff | hist) . . (+1) . . m 2011 IMO Problems/Problem 4 (→Solution)
- 11:10, 22 July 2012 (diff | hist) . . (-1) . . 2011 IMO Problems/Problem 4 (→Solution)
- 11:10, 22 July 2012 (diff | hist) . . (+1) . . 2011 IMO Problems/Problem 4 (→Solution)
- 11:10, 22 July 2012 (diff | hist) . . (-6) . . 2011 IMO Problems/Problem 4 (→Solution)
- 11:10, 22 July 2012 (diff | hist) . . (+2) . . 2011 IMO Problems/Problem 4 (→Solution)
- 11:09, 22 July 2012 (diff | hist) . . (0) . . 2011 IMO Problems/Problem 4 (→Solution)
- 11:09, 22 July 2012 (diff | hist) . . (+1,515) . . 2011 IMO Problems/Problem 4
- 00:40, 22 July 2012 (diff | hist) . . (+9) . . User talk:Baijiangchen (→Sam's stuff)
- 00:23, 22 July 2012 (diff | hist) . . (+19) . . User:Baijiangchen (current)
- 00:22, 22 July 2012 (diff | hist) . . (+137) . . N User:Baijiangchen (Created page with "If: <math>W(0):=1</math> <math>W(n):=\sum_{i=0}^{n-1}({n-1 \choose i}W(i)(x-i-1)!(2^{x-i-1}))</math> Then: <math>W(n)=(2n-1)!!</math>")
- 00:21, 22 July 2012 (diff | hist) . . (+1) . . User talk:Baijiangchen
- 00:21, 22 July 2012 (diff | hist) . . (+1) . . User talk:Baijiangchen
- 00:21, 22 July 2012 (diff | hist) . . (+2) . . User talk:Baijiangchen
- 00:21, 22 July 2012 (diff | hist) . . (+13) . . User talk:Baijiangchen
- 00:20, 22 July 2012 (diff | hist) . . (+120) . . N User talk:Baijiangchen (Created page with "If: <math>W(0):=1</math> <math>W(n):=\sum_{i=0}^{n-1}({n-1 \choose i}W(i)(x-i-1)!(2^{x-i-1})</math> Then: W(n)=(2n-1)!!")
- 19:34, 29 May 2012 (diff | hist) . . (+26) . . m Proof by contradiction (→Euclid's proof of the infinitude of primes)
- 22:23, 17 May 2012 (diff | hist) . . (-14) . . m 2010 AIME I Problems/Problem 4 (→Solution 1)
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