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math.NT2024
Pairs of commuting integer matrices
Tim Browning, Will Sawin, Victor Y. Wang
We prove upper and lower bounds on the number of pairs of commuting matrices with integer entries in , as . Our work uses Fourier analysis and lead…
math.CO2024
The miracle of integer eigenvalues
Richard Kenyon, Maxim Kontsevich, Oleg Ogievetsky +3
For partially ordered sets we consider the square matrices with rows and columns indexed by linear extensions of the partial order on . Each entry $\left( M^{X}\righ…