User contributions
(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)
- 09:12, 12 May 2010 (diff | hist) . . (+6) . . 2010 USAJMO
- 09:10, 12 May 2010 (diff | hist) . . (+36) . . United States of America Mathematical Olympiad (Add USAJMO link)
- 09:07, 12 May 2010 (diff | hist) . . (-2) . . 2010 USAJMO
- 09:05, 12 May 2010 (diff | hist) . . (+36) . . AMC Problems and Solutions (Add USAJMO link)
- 22:59, 11 May 2010 (diff | hist) . . (+43) . . 2010 USAMO Problems (→Problem 5)
- 22:58, 11 May 2010 (diff | hist) . . (+41) . . 2010 USAMO Problems/Problem 5 (→Alternative Calculation)
- 14:51, 11 May 2010 (diff | hist) . . (+12) . . 2010 USAMO Problems/Problem 5 (→Solution)
- 14:33, 11 May 2010 (diff | hist) . . (+2,905) . . N 2010 USAMO Problems/Problem 5 (Created page with '==Problem== Let <math>q = \dfrac{3p-5}{2}</math> where <math>p</math> is an odd prime, and let <center> <cmath> S_q = \frac{1}{2\cdot 3 \cdot 4} + \frac{1}{5\cdot 6 \cdot 7}…')
- 11:01, 11 May 2010 (diff | hist) . . (+210) . . 2010 USAMO Problems/Problem 2 (→Solution)
- 10:33, 11 May 2010 (diff | hist) . . (+2,086) . . N 2010 USAMO Problems/Problem 2 (Created page with '==Problem== There are <math>n</math> students is standing in a circle, one behind the other. The students have heights <math>h_1 < h_2 < \ldots < h_n</math>. If a student with he…')
- 13:22, 9 May 2010 (diff | hist) . . (-413) . . 2010 USAMO Problems/Problem 1 (Cleaner asy code...)
- 00:29, 8 May 2010 (diff | hist) . . (+174) . . 2010 USAMO Problems/Problem 1 (→Solution)
- 15:34, 7 May 2010 (diff | hist) . . (0) . . 2010 USAMO Problems/Problem 3 (→Additional observations)
- 04:04, 7 May 2010 (diff | hist) . . (+5,844) . . N 2010 USAMO Problems/Problem 1 (Created page with '==Problem== Let <math>AXYZB</math> be a convex pentagon inscribed in a semicircle of diameter <math>AB</math>. Denote by <math>P, Q, R, S</math> the feet of the perpendiculars fr…')
- 00:24, 7 May 2010 (diff | hist) . . (-2) . . 2010 USAJMO Problems (→Problem 6)
- 23:54, 6 May 2010 (diff | hist) . . (+2,243) . . N 2010 USAJMO Problems/Problem 4 (Created page with '==Problem== A triangle is called a parabolic triangle if its vertices lie on a parabola <math>y = x^2</math>. Prove that for every nonnegative integer <math>n</math>, there is an…')
- 23:47, 6 May 2010 (diff | hist) . . (+2,495) . . N 2010 USAJMO Problems/Problem 5 (Created page with '==Problem== Two permutations <math>a_1, a_2, \ldots, a_{2010}</math> and <math>b_1, b_2, \ldots, b_{2010}</math> of the numbers <math>1, 2, \ldots, 2010</math> are said to inters…')
- 23:40, 6 May 2010 (diff | hist) . . (+2,955) . . N 2010 USAJMO Problems/Problem 2 (Created page with '==Problem== Let <math>n > 1</math> be an integer. Find, with proof, all sequences <math>x_1, x_2, \ldots, x_{n-1}</math> of positive integers with the following three properties:…')
- 23:34, 6 May 2010 (diff | hist) . . (+8) . . 2010 USAJMO Problems/Problem 1 (→Proof)
- 23:32, 6 May 2010 (diff | hist) . . (+3,040) . . N 2010 USAJMO Problems/Problem 1 (Created page with '==Problem== A permutation of the set of positive integers <math>[n] = {1,2,\ldots,n}</math> is a sequence <math>(a_1,a_2,\ldots,a_n)</math> such that each element of <math>[n]</m…')
- 23:19, 6 May 2010 (diff | hist) . . (+3,183) . . N 2010 USAJMO Problems (Created page with '=Day 1= ==Problem 1== A permutation of the set of positive integers <math>[n] = {1,2,\ldots,n}</math> is a sequence <math>(a_1,a_2,\ldots,a_n)</math> such that each element of <m…')
- 22:30, 6 May 2010 (diff | hist) . . (-3) . . 2010 USAJMO (→Resource)
- 11:58, 6 May 2010 (diff | hist) . . (+4) . . 2010 USAMO Problems/Problem 3 (→Proof)
- 11:57, 6 May 2010 (diff | hist) . . (-96) . . 2010 USAMO Problems/Problem 3 (→Proof)
- 11:53, 6 May 2010 (diff | hist) . . (-8) . . 2010 USAMO Problems/Problem 3 (→Proof)
- 11:48, 6 May 2010 (diff | hist) . . (-2) . . 2010 USAMO Problems/Problem 4 (→Problem)
- 11:47, 6 May 2010 (diff | hist) . . (+473) . . 2010 USAMO Problems/Problem 4 (→Solution)
- 03:23, 6 May 2010 (diff | hist) . . (+365) . . 2010 USAMO Problems/Problem 3 (Minor tweaks and summary)
- 02:46, 6 May 2010 (diff | hist) . . (+890) . . 2010 USAMO Problems/Problem 3 (Derived formula for leading term of limit sequence)
- 18:01, 5 May 2010 (diff | hist) . . (+4,913) . . 2010 USAMO Problems/Problem 3 (Additional notes on the limit sequence)
- 16:19, 5 May 2010 (diff | hist) . . (-129) . . 2010 USAMO Problems/Problem 3 (Redundant)
- 16:12, 5 May 2010 (diff | hist) . . (+795) . . 2010 USAMO Problems/Problem 3 (Final copy after proof-reading...)
- 15:06, 5 May 2010 (diff | hist) . . (0) . . 2010 USAMO Problems/Problem 3 (→Proof)
- 15:01, 5 May 2010 (diff | hist) . . (+153) . . 2010 USAMO Problems/Problem 3 (Work-around lack of automatic centering of displayed equations...)
- 23:09, 4 May 2010 (diff | hist) . . (+4,509) . . 2010 USAMO Problems/Problem 3 (Problem and solution. Displayed equations still look sub-optimal (not centered) and don't work right without a paragraph break... :-()
- 22:17, 4 May 2010 (diff | hist) . . (+287) . . N 2010 USAMO Problems/Problem 3 (Created page with '==Problem== The <math>2010</math> positive numbers <math>a_1, a_2, \ldots , a_{2010}</math> satisfy the inequality <math>a_ia_j \le i+j</math> for all distinct indices <math>i, j…')
- 23:00, 30 April 2010 (diff | hist) . . (+8) . . List of United States high school mathematics competitions (→National high school mathematics competitions)
- 16:28, 27 March 2010 (diff | hist) . . (-40) . . 2006 USAMO Problems/Problem 3 (→Solution)
- 10:18, 26 March 2010 (diff | hist) . . (+236) . . 2006 USAMO Problems/Problem 3 (→Solution)
- 00:10, 26 March 2010 (diff | hist) . . (-20) . . 2006 USAMO Problems/Problem 3 (→Solution)
- 23:52, 25 March 2010 (diff | hist) . . (+4) . . 2006 USAMO Problems/Problem 3 (→Solution)
- 23:50, 25 March 2010 (diff | hist) . . (+5) . . 2006 USAMO Problems/Problem 3 (→Solution)
- 23:48, 25 March 2010 (diff | hist) . . (-3) . . 2006 USAMO Problems/Problem 3 (→Solution)
- 23:46, 25 March 2010 (diff | hist) . . (+3,635) . . 2006 USAMO Problems/Problem 3 (→Solution)
- 18:52, 21 March 2010 (diff | hist) . . (+1) . . 2010 AIME I Problems/Problem 14 (→Solution 3)
- 18:47, 21 March 2010 (diff | hist) . . (+2) . . 2010 AIME I Problems/Problem 14 (→Solution 3)
- 18:33, 21 March 2010 (diff | hist) . . (+5) . . 2010 AIME I Problems/Problem 14 (→Solution 3)
- 18:31, 21 March 2010 (diff | hist) . . (+6) . . 2010 AIME I Problems/Problem 14 (→Solution 3)
- 18:27, 21 March 2010 (diff | hist) . . (+115) . . 2010 AIME I Problems/Problem 14 (→Solution 3)
- 18:21, 21 March 2010 (diff | hist) . . (+8) . . 2010 AIME I Problems/Problem 14 (Explicit solution with no guess-work.)
(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)
