Ivan Shishkin, The Forest Clearing

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Liked problems

No linear recurrence for the primes Une petite fonction arithmétique toute simple^FR Conjecture de Firoozbakht^FR The devil’s logic One of them is invertible Wirtinger’s inequality Compacity of the Julia sets Determinant of a gcd matrix Matrices with a diagonalizable power A cow issue Marden’s theorem Eigenvalues of a weird matrix The golden imposter