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math.NT2009★ 10 cited
Approximations to two real numbers
Igor D. Kan, Nikolay G. Moshchevitin
Probably we have observed a new simple phenomena dealing with approximations to two real numbers.
math.NT2009★ 3 cited
Differentiability of the Minkowski question mark function
Anna A. Dushistova, Igor D. Kan, Nikolai G. Moshchevitin
We prove new results on the derivative of the Minkowski question mark function. Some of our theorems are non-improvable.