# User contributions

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- 07:24, 18 July 2021 (diff | hist) . . (0) . . 2021 USAMO Problems/Problem 4
- 07:24, 18 July 2021 (diff | hist) . . (0) . . 2021 USAMO Problems/Problem 4
- 07:23, 18 July 2021
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**(+1,182)** . . N 2021 USAMO Problems/Problem 4 (Created page with "==Problem== The Planar National Park is a subset of the Euclidean plane consisting of several trails which meet at junctions. Every trail has its two endpoints at two differen...") - 07:21, 18 July 2021 (diff | hist) . . (-24) . . 2021 USAMO Problems/Problem 3 (current)
- 07:20, 18 July 2021 (diff | hist) . . (-6) . . 2021 USAMO Problems/Problem 3
- 07:19, 18 July 2021 (diff | hist) . . (+15) . . 2021 USAMO Problems/Problem 3
- 07:19, 18 July 2021 (diff | hist) . . (+7) . . 2021 USAMO Problems/Problem 3
- 07:19, 18 July 2021
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**(+785)** . . 2021 USAMO Problems/Problem 3 - 09:20, 14 July 2021 (diff | hist) . . (+150) . . 2016 APMO Problems/Problem 5 (→Solution) (current)
- 05:05, 14 July 2021 (diff | hist) . . (-4) . . 2016 APMO Problems/Problem 5 (→Solution)
- 04:48, 14 July 2021
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**(+566)** . . 2016 APMO Problems/Problem 5 (→Solution) - 04:42, 14 July 2021 (diff | hist) . . (+2) . . 2016 APMO Problems/Problem 5 (→Solution)
- 04:41, 14 July 2021 (diff | hist) . . (+13) . . 2016 APMO Problems/Problem 5 (→Solution)
- 04:40, 14 July 2021 (diff | hist) . . (+150) . . 2016 APMO Problems/Problem 5 (→Solution)
- 04:36, 14 July 2021 (diff | hist) . . (+2) . . 2016 APMO Problems/Problem 5 (→Solution)
- 04:36, 14 July 2021 (diff | hist) . . (+15) . . 2016 APMO Problems/Problem 5 (→Solution)
- 04:34, 14 July 2021 (diff | hist) . . (+143) . . 2016 APMO Problems/Problem 5 (→Solution)
- 04:28, 14 July 2021 (diff | hist) . . (+264) . . 2016 APMO Problems/Problem 5 (→Solution)
- 04:23, 14 July 2021 (diff | hist) . . (+196) . . 2016 APMO Problems/Problem 5 (→Solution)
- 06:53, 13 July 2021 (diff | hist) . . (+37) . . 2016 APMO Problems/Problem 5 (→Solution)
- 06:43, 13 July 2021 (diff | hist) . . (+148) . . 2016 APMO Problems/Problem 5 (→Solution)
- 00:12, 13 July 2021 (diff | hist) . . (+50) . . 2016 APMO Problems/Problem 5 (→Solution)
- 00:12, 13 July 2021 (diff | hist) . . (+88) . . 2016 APMO Problems/Problem 5 (→Solution)
- 00:07, 13 July 2021 (diff | hist) . . (+108) . . 2016 APMO Problems/Problem 5 (→Solution)
- 00:05, 13 July 2021 (diff | hist) . . (+2) . . 2016 APMO Problems/Problem 5 (→Solution)
- 00:04, 13 July 2021 (diff | hist) . . (+161) . . 2016 APMO Problems/Problem 5 (→Solution)
- 23:57, 12 July 2021 (diff | hist) . . (+82) . . 2016 APMO Problems/Problem 5
- 23:51, 12 July 2021 (diff | hist) . . (+4) . . 2016 APMO Problems/Problem 5 (→Solution)
- 23:50, 12 July 2021 (diff | hist) . . (+71) . . 2016 APMO Problems/Problem 5
- 23:47, 12 July 2021 (diff | hist) . . (+91) . . 2016 APMO Problems/Problem 5 (→Solution)
- 23:43, 12 July 2021 (diff | hist) . . (+385) . . 2016 APMO Problems/Problem 5 (→Solution)
- 23:34, 12 July 2021 (diff | hist) . . (+15) . . 2016 APMO Problems/Problem 5 (→Solution)
- 23:31, 12 July 2021 (diff | hist) . . (+187) . . 2016 APMO Problems/Problem 5 (→Solution)
- 22:09, 11 July 2021 (diff | hist) . . (+210) . . 2016 APMO Problems (current)
- 22:06, 11 July 2021
(diff | hist) . .
**(+2,334)** . . 2016 APMO Problems - 22:04, 11 July 2021 (diff | hist) . . (+1) . . 2016 APMO Problems
- 22:03, 11 July 2021 (diff | hist) . . (+143) . . N 2016 APMO Problems (Created page with "==See Also== == See Also == * Asian Pacific Mathematics Olympiad * APMO Problems and Solutions * Mathematics competition resources")
- 22:00, 11 July 2021
(diff | hist) . .
**(+549)** . . N 2016 APMO (Created page with "'''2016 APMO''' problems and solutions. The first link contains the full set of test problems. The rest contain each individual problem and its solution. * 2016 APMO Prob...") (current) - 21:57, 11 July 2021 (diff | hist) . . (+463) . . N 1989 APMO Problems/Problem 5 (Created page with "==Problem== Determine all functions <math>f</math> from the reals to the reals for which (1) <math>f(x)</math> is strictly increasing and (2) <math>f(x) + g(x) = 2x</math> f...") (current)
- 21:56, 11 July 2021 (diff | hist) . . (+402) . . N 1989 APMO Problems/Problem 4 (Created page with "==Problem== Let <math>S</math> be a set consisting of <math>m</math> pairs <math>(a,b)</math> of positive integers with the property that <math>1 \leq a < b \leq n</math>. Sh...") (current)
- 21:56, 11 July 2021
(diff | hist) . .
**(+696)** . . N 1989 APMO Problems/Problem 3 (Created page with "==Problem== Let <math>A_1</math>, <math>A_2</math>, <math>A_3</math> be three points in the plane, and for convenience, let <math>A_4= A_1</math>, <math>A_5 = A_2</math>. For...") (current) - 21:55, 11 July 2021 (diff | hist) . . (+162) . . N 1989 APMO Problems/Problem 2 (Created page with "==Problem== Prove that the equation<cmath> 6(6a^2 + 3b^2 + c^2) = 5n^2 </cmath>has no solutions in integers except <math>a = b = c = n = 0</math>. ==Solution==") (current)
- 21:54, 11 July 2021 (diff | hist) . . (+320) . . N 1989 APMO Problems/Problem 1 (Created page with "==Problem== Let <math>x_1</math>, <math>x_2</math>, <math>\cdots</math>, <math>x_n</math> be positive real numbers, and let <cmath> S = x_1 + x_2 + \cdots + x_n. </cmath> Pro...") (current)
- 21:53, 11 July 2021 (diff | hist) . . (+214) . . N 2016 APMO Problems/Problem 5 (Created page with "==Problem== Find all functions <math>f: \mathbb{R}^+ \to \mathbb{R}^+</math> such that <cmath>(z + 1)f(x + y) = f(xf(z) + y) + f(yf(z) + x),</cmath>for all positive real numb...")
- 21:52, 11 July 2021
(diff | hist) . .
**(+529)** . . N 2016 APMO Problems/Problem 4 (Created page with "==Problem== The country Dreamland consists of <math>2016</math> cities. The airline Starways wants to establish some one-way flights between pairs of cities in such a way tha...") (current) - 21:51, 11 July 2021
(diff | hist) . .
**(+735)** . . N 2016 APMO Problems/Problem 3 (Created page with "==Problem== Let <math>AB</math> and <math>AC</math> be two distinct rays not lying on the same line, and let <math>\omega</math> be a circle with center <math>O</math> that i...") (current) - 21:50, 11 July 2021 (diff | hist) . . (+361) . . N 2016 APMO Problems/Problem 2 (Created page with "==Problem== A positive integer is called fancy if it can be expressed in the form<cmath>2^{a_1}+2^{a_2}+ \cdots+ 2^{a_{100}},</cmath>where <math>a_1,a_2, \cdots, a_{100}</mat...") (current)
- 21:49, 11 July 2021
(diff | hist) . .
**(+560)** . . N 2016 APMO Problems/Problem 1 (Created page with "==Problem== We say that a triangle <math>ABC</math> is great if the following holds: for any point <math>D</math> on the side <math>BC</math>, if <math>P</math> and <math>Q</...") (current) - 08:06, 26 April 2021 (diff | hist) . . (-7) . . 2020 INMO (current)
- 08:05, 26 April 2021 (diff | hist) . . (+1) . . 2020 INMO

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