2 August 2020

• 02:5502:55, 2 August 2020 diff hist +8 Power Mean Inequality →Inequality

31 July 2020

• 08:4408:44, 31 July 2020 diff hist +20 m Jensen's Inequality →Example
• 08:3908:39, 31 July 2020 diff hist 0 m Jensen's Inequality →Example
• 08:3908:39, 31 July 2020 diff hist +113 m Jensen's Inequality →Example
• 08:3808:38, 31 July 2020 diff hist −27 Power Mean Inequality →Description
• 08:3308:33, 31 July 2020 diff hist −4 m Jensen's Inequality →Inequality
• 08:3308:33, 31 July 2020 diff hist 0 Jensen's Inequality →Inequality
• 08:3208:32, 31 July 2020 diff hist +7 Jensen's Inequality →Proof
• 08:2808:28, 31 July 2020 diff hist +135 Jensen's Inequality →Proof
• 08:2108:21, 31 July 2020 diff hist +628 Jensen's Inequality →Proof

30 July 2020

• 19:2919:29, 30 July 2020 diff hist −3 Power Mean Inequality →Proof
• 19:1819:18, 30 July 2020 diff hist +46 Power Mean Inequality →Proof
• 19:1219:12, 30 July 2020 diff hist +26 Power Mean Inequality →Description
• 11:0011:00, 30 July 2020 diff hist 0 Power Mean Inequality →Description
• 10:5210:52, 30 July 2020 diff hist −79 Power Mean Inequality →Description
• 10:5110:51, 30 July 2020 diff hist +224 Power Mean Inequality →Inequality
• 10:3910:39, 30 July 2020 diff hist +8 Power Mean Inequality →Proof
• 10:3610:36, 30 July 2020 diff hist +185 Power Mean Inequality →Proof
• 10:1610:16, 30 July 2020 diff hist −748 Power Mean Inequality →Proof
• 10:1010:10, 30 July 2020 diff hist +1,991 Power Mean Inequality No edit summary

4 June 2020

• 22:3622:36, 4 June 2020 diff hist +6 1998 JBMO Problems/Problem 2 →See Also
• 22:3522:35, 4 June 2020 diff hist +53 1998 JBMO Problems/Problem 2 →Solutions
• 22:2622:26, 4 June 2020 diff hist −4 m 1998 JBMO Problems/Problem 2 →Solution 1
• 22:2322:23, 4 June 2020 diff hist +83 1998 JBMO Problems/Problem 2 →Solution 1
• 22:0422:04, 4 June 2020 diff hist 0 1998 JBMO Problems/Problem 2 →Solution 2
• 22:0422:04, 4 June 2020 diff hist +32 1998 JBMO Problems/Problem 2 →Solution 2
• 21:5921:59, 4 June 2020 diff hist +834 1998 JBMO Problems/Problem 2 →Solution

28 March 2019

• 06:2306:23, 28 March 2019 diff hist +41 1988 IMO Problems/Problem 2 →Problem
• 06:2206:22, 28 March 2019 diff hist +54 1988 IMO Problems/Problem 2 →Problem
• 06:1706:17, 28 March 2019 diff hist +651 N 1988 IMO Problems/Problem 2 Created page with "== Problem == Let <math>n</math> be a positive integer and let <math>A_1, A_2, \cdots, A_{2n+1}</math> be subsets of a set <math>B</math>. Suppose that (a) Each <math>A_i</..."

18 March 2018

• 23:3823:38, 18 March 2018 diff hist −21 1986 IMO Problems/Problem 1 No edit summary
• 23:2823:28, 18 March 2018 diff hist +845 1986 IMO Problems/Problem 1 No edit summary
• 23:1523:15, 18 March 2018 diff hist −404 1959 IMO Problems/Problem 1 No edit summary

17 February 2018

• 23:5523:55, 17 February 2018 diff hist +1 m 1959 IMO Problems/Problem 4 No edit summary
• 14:4314:43, 17 February 2018 diff hist +488 N 1975 IMO Problems/Problem 1 Created page with "==Problem== Let <math>x_i, y_i</math> <math>(i=1,2,\cdots,n)</math> be real numbers such that <cmath>x_1\ge x_2\ge\cdots\ge x_n \text{ and } y_1\ge y_2\ge\cdots\ge y_n.</cmath..."
• 14:3314:33, 17 February 2018 diff hist +446 N 1974 IMO Problems/Problem 6 Created page with "==Problem== Let <math>P</math> be a non-constant polynomial with integer coefficients. If <math>n(P)</math> is the number of distinct integers <math>k</math> such that <math>(..."
• 14:2914:29, 17 February 2018 diff hist +662 N 1974 IMO Problems/Problem 4 Created page with "==Problem== Consider decompositions of an <math>8\times8</math> chessboard into <math>p</math> non-overlapping rectangles subject to the following conditions: (i) Each rectan..."
• 14:2414:24, 17 February 2018 diff hist +274 N 1974 IMO Problems/Problem 3 Created page with "==Problem== Prove that the number <math>\sum^n_{k=0}\binom{2n+1}{2k+1}2^{3k}</math> is not divisible by <math>5</math> for any integer <math>n\ge0.</math> ==Solution== {{solu..."
• 14:2114:21, 17 February 2018 diff hist +590 N 1973 IMO Problems/Problem 6 Created page with "==Problem== Let <math>a_1, a_2,\cdots, a_n</math> be <math>n</math> positive numbers, and let <math>q</math> be a given real number such that <math>0<q<1.</math> Find <math>n<..."
• 14:1514:15, 17 February 2018 diff hist +690 N 1973 IMO Problems/Problem 1 Created page with "==Problem== Point <math>O</math> lies on line <math>g;</math> <math>\overrightarrow{OP_1}, \overrightarrow{OP_2},\cdots, \overrightarrow{OP_n}</math> are unit vectors such tha..."
• 14:0314:03, 17 February 2018 diff hist +1 m 1971 IMO Problems/Problem 1 No edit summary
• 14:0214:02, 17 February 2018 diff hist −40 m 1967 IMO Problems/Problem 3 No edit summary
• 14:0114:01, 17 February 2018 diff hist −40 m 1969 IMO Problems/Problem 2 No edit summary
• 14:0114:01, 17 February 2018 diff hist +100 m 1971 IMO Problems/Problem 1 No edit summary
• 13:5913:59, 17 February 2018 diff hist 0 m 1967 IMO Problems/Problem 3 No edit summary
• 13:5913:59, 17 February 2018 diff hist +501 N 1971 IMO Problems/Problem 2 Created page with "==Problem== Consider a convex polyhedron <math>P_1</math> with nine vertices <math>A_1, A_2, \cdots, A_9;</math> let <math>P_i</math> be the polyhedron obtained from <math>P_1..."
• 13:5313:53, 17 February 2018 diff hist +127 m 1967 IMO Problems/Problem 3 No edit summary
• 13:5113:51, 17 February 2018 diff hist +120 m 1969 IMO Problems/Problem 2 No edit summary
• 13:5013:50, 17 February 2018 diff hist +7 m 1969 IMO Problems/Problem 2 No edit summary
• 13:4713:47, 17 February 2018 diff hist +366 N 1971 IMO Problems/Problem 1 Created page with "Prove that the following assertion is true for <math>n=3</math> and <math>n=5</math>, and that it is false for every other natural number <math>n>2:</math> If <math>a_1, a_2,..."