Comentarii Jbmo 2015 -

This problem involved minimizing a specific expression given the constraint

A problem involving an acute triangle and perpendicular lines from a midpoint. The goal was to prove an equality between two angles, Comentarii JBMO 2015

The competition consisted of four problems covering algebra, number theory, geometry, and combinatorics. This problem involved minimizing a specific expression given

A game-theory problem on a board involving L-shapes. It required determining the minimum number of marked squares needed to ensure a certain outcome. Key Commentary Insights Comentarii JBMO 2015