# User contributions

- 11:14, 20 July 2010 (diff | hist) . . (+452) . . N 2010 IMO Problems/Problem 6 (Created page with '== Problem == Let <math>a_1, a_2, a_3, \ldots</math> be a sequence of positive real numbers, and <math>s</math> be a positive integer, such that <cmath>a_n = \max \{ a_k + a_{n-…')
- 11:13, 20 July 2010
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**(+906)** . . N 2010 IMO Problems/Problem 5 (Created page with '== Problem == Each of the six boxes <math>B_1</math>, <math>B_2</math>, <math>B_3</math>, <math>B_4</math>, <math>B_5</math>, <math>B_6</math> initially contains one coin. The f…') - 11:11, 20 July 2010 (diff | hist) . . (+235) . . N 2010 IMO Problems/Problem 3 (Created page with '== Problem == Find all functions <math>g:\mathbb{N}\rightarrow\mathbb{N}</math> such that <math>\left(g(m)+n\right)\left(g(n)+m\right)</math> is a perfect square for all <math>m…')
- 11:08, 20 July 2010
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**(+592)** . . N 2010 IMO Problems/Problem 2 (Created page with '== Problem == Given a triangle <math>ABC</math>, with <math>I</math> as its incenter and <math>\Gamma</math> as its circumcircle, <math>AI</math> intersects <math>\Gamma</math> …') - 09:36, 17 August 2009 (diff | hist) . . (-4) . . AoPS Wiki:Competition ratings (→USA TST)
- 09:36, 17 August 2009 (diff | hist) . . (-3) . . AoPS Wiki:Competition ratings (→USAMO)
- 17:39, 8 August 2009 (diff | hist) . . (-1) . . IMO Problems and Solutions (→2009)
- 12:59, 8 August 2009 (diff | hist) . . (+6) . . AoPS Wiki:Competition ratings (→IMO Shortlist)
- 12:59, 8 August 2009 (diff | hist) . . (-194) . . AoPS Wiki:Competition ratings (→China TST)
- 12:58, 8 August 2009 (diff | hist) . . (+4) . . AoPS Wiki:Competition ratings (→Balkan MO)
- 12:57, 8 August 2009 (diff | hist) . . (-4) . . AoPS Wiki:Competition ratings (→Indonesian MO)
- 12:56, 8 August 2009 (diff | hist) . . (-286) . . AoPS Wiki:Competition ratings (→AIME)
- 12:55, 8 August 2009 (diff | hist) . . (0) . . AoPS Wiki:Competition ratings (→AMC 12)
- 12:55, 8 August 2009 (diff | hist) . . (-1) . . AoPS Wiki:Competition ratings (→AMC 10)
- 06:46, 23 July 2009
(diff | hist) . .
**(+3,011)** . . N 2009 IMO Problems (Created page with 'Problems of the 50th IMO 2009 in Bremen, Germany. == Day I == === Problem 1. === Let <math>n</math> be a positive integer and let <math>a_1,\ldots,a_k (k\ge2)</math> be …') - 06:34, 23 July 2009 (diff | hist) . . (+71) . . IMO Problems and Solutions (→Comment)
- 06:33, 23 July 2009
(diff | hist) . .
**(+592)** . . N 2009 IMO Problems/Problem 6 (Created page with '== Problem == Let <math>a_1,a_2,\ldots,a_n</math> be distinct positive integers and let <math>M</math> be a set of <math>n-1</math> positive integers not containing <math>s=a_1+…') - 06:30, 23 July 2009 (diff | hist) . . (+483) . . N 2009 IMO Problems/Problem 5 (Created page with '== Problem == Determine all functions <math>f</math> from the set of positive integers to the set of positive integers such that, for all positive integers <math>a</math> and <m…')
- 06:27, 23 July 2009
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**(+556)** . . N 2009 IMO Problems/Problem 4 (Created page with '== Problem == Let <math>ABC</math> be a triangle with <math>AB=AC</math>. The angle bisectors of <math>\angle CAB</math> and <math>\angle BAC</math> meet the sides <math>BC</mat…') - 06:23, 23 July 2009 (diff | hist) . . (-24) . . 2009 IMO Problems/Problem 1 (→Solution)
- 06:23, 23 July 2009 (diff | hist) . . (+52) . . 2009 IMO Problems/Problem 1 (→Problem)
- 06:22, 23 July 2009 (diff | hist) . . (+52) . . 2009 IMO Problems/Problem 2 (→Problem)
- 06:22, 23 July 2009 (diff | hist) . . (+475) . . N 2009 IMO Problems/Problem 3 (Created page with '== Problem == Suppose that <math>s_1,s_2,s_3,\ldots</math> is a strictly increasing sequence of positive integers such that the subsequences <center> <math>s_{s_1},s_{s_2},s_{…')
- 06:17, 23 July 2009
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**(+584)** . . N 2009 IMO Problems/Problem 2 (Created page with '== Problem == Let <math>ABC</math> be a triangle with circumcentre <math>O</math>. The points <math>P</math> and <math>Q</math> are interior points of the sides <math>CA</math> …') - 06:14, 23 July 2009
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**(+867)** . . 2009 IMO Problems/Problem 1 (→Problem) - 06:08, 23 July 2009 (diff | hist) . . (+320) . . N 2009 IMO Problems/Problem 1 (Created page with '== Problem == Let <math>n</math> be a positive integer and let <math>a_1,\ldots,a_k (k\ge2)</math> be distinct integers in the set <math>\{1,\ldots,n\}</math> such that <math>n…')
- 16:16, 21 July 2009
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**(+930)** . . AoPS Wiki:Competition ratings (→JBMO) - 07:08, 21 July 2009 (diff | hist) . . (-21) . . Junior Balkan Mathematical Olympiad (→Past JBMOs)
- 07:07, 21 July 2009 (diff | hist) . . (+224) . . Junior Balkan Mathematical Olympiad (→Past JBMOs)
- 14:31, 18 July 2009 (diff | hist) . . (+4) . . AoPS Wiki:Competition ratings (→AMC 8)
- 14:30, 18 July 2009 (diff | hist) . . (+2) . . AoPS Wiki:Competition ratings (→China TST)
- 14:29, 18 July 2009 (diff | hist) . . (+6) . . AoPS Wiki:Competition ratings (→China TST)
- 14:26, 18 July 2009 (diff | hist) . . (0) . . AoPS Wiki:Competition ratings (→IMO)
- 14:26, 18 July 2009 (diff | hist) . . (0) . . AoPS Wiki:Competition ratings (→USAMO)
- 14:25, 18 July 2009 (diff | hist) . . (0) . . AoPS Wiki:Competition ratings (→JBMO)
- 09:21, 18 July 2009 (diff | hist) . . (0) . . AoPS Wiki:Competition ratings (→USAMO)
- 09:20, 18 July 2009 (diff | hist) . . (0) . . AoPS Wiki:Competition ratings (→IMO)
- 09:20, 18 July 2009 (diff | hist) . . (0) . . AoPS Wiki:Competition ratings (→JBMO)
- 09:20, 18 July 2009 (diff | hist) . . (0) . . AoPS Wiki:Competition ratings (→AIME)
- 08:43, 18 July 2009 (diff | hist) . . (+2) . . AoPS Wiki:Competition ratings (→IMO)
- 08:38, 18 July 2009 (diff | hist) . . (+10) . . AoPS Wiki:Competition ratings (→USAMO)
- 08:38, 18 July 2009 (diff | hist) . . (+8) . . AoPS Wiki:Competition ratings (→IMO)
- 08:37, 18 July 2009 (diff | hist) . . (+8) . . AoPS Wiki:Competition ratings (→JBMO)
- 08:37, 18 July 2009 (diff | hist) . . (+7) . . AoPS Wiki:Competition ratings (→AIME)
- 15:53, 24 January 2009 (diff | hist) . . (0) . . Brute forcing (current)