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    Baire category and nowhere differentiability for feasible functions
    with J. M. Breutzmann and J. H. Lutz
    Mathematical Logic Quarterly 50 (4): 460. 2004.
    A notion of resource-bounded Baire category is developed for the class PC[0,1] of all polynomial-time computable real-valued functions on the unit interval. The meager subsets of PC[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 PC[0,1] is nowhere differentiable. This is a complexity-theoretic extension of the analogous classical result that Banach proved for the class C…Read more