Two open problems on effective dimension

  • Authors:
  • Elvira Mayordomo

  • Affiliations:
  • Dept. de Informática e Ing. de Sistemas, Universidad de Zaragoza, Zaragoza, Spain

  • Venue:
  • CiE'06 Proceedings of the Second conference on Computability in Europe: logical Approaches to Computational Barriers
  • Year:
  • 2006

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Abstract

Effective fractal dimension was defined by Lutz [13]in order to quantitatively analyze the structure of complexity classes. The dimension of a class X inside a base class ${\mathcal{C}}$ is a real number in [0,1] corresponding to the relative size of $X \cap \mathcal{C}$ inside $\mathcal{C}$. Basic properties include monotonicity, so dimension 1 classes are maximal and dimension 0 ones are minimal, and the fact that dimension is defined for every classX, making effective dimension a precise quantitative tool.