14 November 2019

• 10:5110:51, 14 November 2019 diff hist +43 m Schroeder-Bernstein Theorem Added clarification that $f(a)$ cannot be lonely; which is why f(a) = f(g(b)) for some b.

20 April 2017

• 20:0220:02, 20 April 2017 diff hist +226 N 2017 USAMO Problems/Problem 6 Created page with "==Problem== Find the minimum possible value of <cmath>\frac{a}{b^3+4}+\frac{b}{c^3+4}+\frac{c}{d^3+4}+\frac{d}{a^3+4},</cmath> given that <math>a,b,c,d,</math> are nonnega..."
• 18:4118:41, 20 April 2017 diff hist +434 N 2017 USAMO Problems/Problem 2 Created page with "==Problem== Let <math>m_1,\dotsc,m_n</math> be a collection of <math>n</math> positive integers, not necessarily distinct. For any sequence of integers <math>A = (a_1,\dotsc,a..."
• 18:3318:33, 20 April 2017 diff hist +1,842 2017 USAMO Problems/Problem 1 →Problem
• 18:2018:20, 20 April 2017 diff hist +200 N 2017 USAMO Problems/Problem 1 Added problem

21 February 2016

• 18:4118:41, 21 February 2016 diff hist +95 m 2016 AMC 12B Problems/Problem 13 Changed the math to LaTeX as a better format