Generic Hausdorff dimension conjecture for Takagi-function abscissa level sets

Let τ\tau be the Takagi function, and for x[0,1]x\in[0,1] let L(τ(x))L(\tau(x)) denote the level set of points having Takagi value τ(x)\tau(x). A set of abscissa points has full Lebesgue measure if its complement in [0,1][0,1] has Lebesgue measure zero.

Abscissa generic level sets. A full Lebesgue measure set of abscissa points x[0,1]x\in[0,1] have level sets L(τ(x))L(\tau(x)) that are uncountable and have Hausdorff dimension 00.

This conjecture refines the known almost-everywhere result that generic local level sets are uncountable and have Hausdorff dimension zero, by asserting the same properties for the full level sets L(τ(x))L(\tau(x)).

Sources & referencesView supporting material

Primary source

Jeffrey C. Lagarias and Zachary Maddock, “Level Sets of the Takagi Function: Generic Level Sets”, arXiv:1011.3183 (2011).

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