A Definition for Fine Tuning in Analogy to the Chaos
  Anthropic principles were grown from the problem of fine tuning. Although anthropic principles have been discussed in cosmology for years there is no exact definition for fine tuning. Starting from the supposed similarity in the topologies of chaotic and fine tuned regions of the proper phase spaces, we introduce an alternative Lyapunov indicator for the measure of fine tuning. This fine-tuning indicator expresses the decrease of life-bearing potentiality of a universe with the increase of the difference from the physical constants of the universe with maximum life-bearing potentiality. 
Zs. Hetesi, L. V\'egh