Abstract
Setokuchi and Takashima (Unif Distrib Theory (2) 9:31–57, 2014) and Setokuchi (Acta Math Hung, [11]) gave refinements of estimates for discrepancies by using Schoissengeier’s exact formula. Mori and Takashima (Period Math Hung, [7]) discussed the distribution of the leading digits of $$a^n$$ by approximating irrational rotations by “rational rotations”. We apply here their methods to the estimation of discrepancies. We give much more accurate estimates for discrepancies by simple direct calculations, without using Schoissengeier’s formula. We show that the initial segment of the graph of discrepancies of irrational rotations with a single isolated large partial quotient is linearly decreasing, provided we observe the discrepancies on a linear scale with suitable step. We also prove that large hills, caused by single isolated large partial quotients, will appear infinitely often.
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