23 April 2012

• 16:3516:35, 23 April 2012 diff hist −24 m 1976 IMO Problems →Problem 4

17 January 2012

• 15:2715:27, 17 January 2012 diff hist +306 Chicken McNugget Theorem No edit summary

9 June 2011

• 12:3512:35, 9 June 2011 diff hist +1,681 2005 Canadian MO Problems/Problem 3 →Solution current

5 June 2011

• 12:1412:14, 5 June 2011 diff hist +6 m Extreme principle No edit summary

4 June 2011

• 15:1115:11, 4 June 2011 diff hist 0 Extreme principle →Problems
• 15:1115:11, 4 June 2011 diff hist −1 m Extreme principle →Problems
• 15:1015:10, 4 June 2011 diff hist +45 Extreme principle →Problems
• 15:1015:10, 4 June 2011 diff hist +400 N Extreme principle/solutions Created page with "These are the solutions to the problems on the extreme principle. ===1=== First, we note that it is impossible for a coin <math>\omega</math> to be tangent to six coins <mat..."
• 15:0415:04, 4 June 2011 diff hist +2,488 N Extreme principle Created page with "The extreme principle (or extremal principle) is a problem-solving technique that involves looking at objects with extreme properties, such as the largest or smallest element. Fo..."

3 June 2011

• 16:3816:38, 3 June 2011 diff hist +4,324 N Projective geometry Created page with 'Projective geometry is a beautiful area of geometry which focuses on properties that are invariant under projective transformations. Unlike Euclidean geometry, there is no notion…'
• 16:2716:27, 3 June 2011 diff hist 0 m Pascal's Theorem No edit summary
• 16:2416:24, 3 June 2011 diff hist 0 Pascal's Theorem No edit summary
• 16:0216:02, 3 June 2011 diff hist +64 2006 Canadian MO Problems/Problem 5 →Solution current
• 15:5915:59, 3 June 2011 diff hist +1,164 2006 Canadian MO Problems/Problem 5 →Solution

2 June 2011

• 18:0318:03, 2 June 2011 diff hist +586 2006 Canadian MO Problems/Problem 5 →Problem

1 June 2011

• 16:0216:02, 1 June 2011 diff hist 0 Pigeonhole Principle/Solutions →M3
• 16:0116:01, 1 June 2011 diff hist +11 Pigeonhole Principle →Examples
• 11:0911:09, 1 June 2011 diff hist +21 Pigeonhole Principle/Solutions →M3
• 11:0711:07, 1 June 2011 diff hist −11 Pigeonhole Principle →Intermediate Problems
• 11:0611:06, 1 June 2011 diff hist +11 Pigeonhole Principle →Intermediate Problems
• 11:0411:04, 1 June 2011 diff hist +1 Pigeonhole Principle/Solutions →M3
• 11:0311:03, 1 June 2011 diff hist 0 Pigeonhole Principle/Solutions →M3
• 11:0211:02, 1 June 2011 diff hist +781 Pigeonhole Principle/Solutions →Intermediate
• 10:5510:55, 1 June 2011 diff hist −350 Pigeonhole Principle/Solutions →Introductory
• 10:5410:54, 1 June 2011 diff hist −34 Pigeonhole Principle/Solutions →Olympiad
• 10:5310:53, 1 June 2011 diff hist +1 Pigeonhole Principle →Intermediate Problems
• 10:5310:53, 1 June 2011 diff hist +3 Pigeonhole Principle →Introductory Problems
• 10:5310:53, 1 June 2011 diff hist +416 Pigeonhole Principle →Intermediate Problems
• 10:5010:50, 1 June 2011 diff hist −365 Pigeonhole Principle →Olympiad Problems
• 10:4210:42, 1 June 2011 diff hist 0 Pigeonhole Principle/Solutions →Introductory
• 10:4210:42, 1 June 2011 diff hist 0 Pigeonhole Principle/Solutions →Introductory
• 10:4110:41, 1 June 2011 diff hist +402 Pigeonhole Principle/Solutions →Introductory
• 10:3910:39, 1 June 2011 diff hist −5 Pigeonhole Principle →Introductory Problems
• 10:3910:39, 1 June 2011 diff hist +5 Pigeonhole Principle →Introductory Problems
• 10:3910:39, 1 June 2011 diff hist −1 Pigeonhole Principle →Introductory Problems
• 10:3810:38, 1 June 2011 diff hist +236 Pigeonhole Principle →Introductory Problems
• 10:2110:21, 1 June 2011 diff hist +3 Pigeonhole Principle No edit summary
• 10:2010:20, 1 June 2011 diff hist 0 Pigeonhole Principle/Solutions No edit summary
• 10:2010:20, 1 June 2011 diff hist −9 Pigeonhole Principle/Solutions →Introductory
• 10:2010:20, 1 June 2011 diff hist +5 Pigeonhole Principle/Solutions →Introductory
• 10:1910:19, 1 June 2011 diff hist +509 Pigeonhole Principle/Solutions →Introductory
• 10:1710:17, 1 June 2011 diff hist +1 Pigeonhole Principle →Introductory Problems
• 10:1710:17, 1 June 2011 diff hist +48 Pigeonhole Principle →Introductory Problems
• 10:1610:16, 1 June 2011 diff hist +26 Pigeonhole Principle →Introductory Problems

31 May 2011

• 18:0018:00, 31 May 2011 diff hist −13 2010 AMC 12B Problems/Problem 19 No edit summary
• 17:5517:55, 31 May 2011 diff hist +26 2001 USAMO Problems/Problem 3 →Solution
• 17:5517:55, 31 May 2011 diff hist +1 2001 USAMO Problems/Problem 3 →Solution
• 17:5217:52, 31 May 2011 diff hist +27 2001 USAMO Problems/Problem 3 →Solution
• 17:5017:50, 31 May 2011 diff hist +103 2001 USAMO Problems/Problem 3 →Solution
• 17:4917:49, 31 May 2011 diff hist +193 2001 USAMO Problems/Problem 3 →Solution