A singular function from Sturmian continued fractions
J. Korean Math. Soc.
Published online 2019 Feb 12
DoYong Kwon
Chonnam National University
Abstract : For $\alpha\geq1$, let $s_\alpha(n)=\lceil\alpha n \rceil - \lceil \alpha (n-1) \rceil$.
A continued fraction $C(\alpha)=[0; s_\alpha(1), s_\alpha(2),\ldots]$ is considered and analyzed.
Appealing to Diophantine approximation, we investigate the differentiability of $C(\alpha)$, and then show its singularity.
Keywords : singular function, continued fraction, Diophantine approximation, Sturmian word
MSC numbers : 26A30, 11A55, 11J04, 68R15
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