In this paper we show that the probability distributions for a surjective unimodal map can be classified into three types,δ function,asymmetric and symmetric type,by identifying the binary structures of its initial values.The Borel's normal number theorem is equivalent or prior to the Frobenius-Perron operator in analyzing the probability distributions for this kind of maps,and in particular we can constitute a multifractal probability distribution from the surjective tent map by selecting a non- Borel's normal number as the initial value.
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