Abstract
A notion of resource-bounded Baire category is developed for the class P C[0,1] of all polynomial-time computable real-valued functions on the unit interval. The meager subsets of P C[0,1] are characterized in terms of resource-bounded Banach-Mazur games. This characterization is used to prove that, in the sense of Baire category, almost every function in P C[0,1] is nowhere differentiable. This is a complexity-theoretic extension of the analogous classical result that Banach proved for the class C[0, 1] in 1931.
This research was supported in part by National Science Foundation Grants 9157382, 9610461, and 9988483.
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Breutzmann, J.M., Juedes, D.W., Lutz, J.H. (2001). Baire Category and Nowhere Differentiability for Feasible Real Functions. In: Eades, P., Takaoka, T. (eds) Algorithms and Computation. ISAAC 2001. Lecture Notes in Computer Science, vol 2223. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45678-3_20
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DOI: https://doi.org/10.1007/3-540-45678-3_20
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