International Mathematics Competition
for University Students
2019

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IMC2019: Day 2, Problem 9

Problem 9. Determine all positive integers \(\displaystyle n\) for which there exist \(\displaystyle n\times n\) real invertible matrices \(\displaystyle A\) and \(\displaystyle B\) that satisfy \(\displaystyle AB-BA=B^2A\).

Proposed by Karen Keryan, Yerevan State University & American University of Armenia, Yerevan

        

IMC
2019

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