A Possible Approach to the Framework of the Fundamental Theory of System Science:Part Eight
建立系统科学基础理论框架的一种可能途径与若干具体思路(之八)--固定环境中的稳态涌现

A qualitative and qualitative framework for the fundamental theory of system sciences as well as some details is given on the basis of some new experimental evidence, ideals and achievements concerning evolution in many fields such as modern physics, molecule biology and brain anatomy, etc. Some concepts such as interaction, evolution, adaptability, and complexity are discussed. Intuitional annotations about catastrophe, bifurcation, attractor, chaos, fractal and synergy are also given. The essence and the value of information, and the closed relation between information and nonlinearity are investigated. It is no doubt that all the works are to be considered in detail, although we have some rigorous results in particular steps. It is the eighth part of the paper. Selection operator based on fitness is defined in the first place, and then it is proved that the sequences of probability distributions in agents' strategies set, when repeatedly operated by selection operator, converges to the probability distribution in the subset of strategies that takes the largest value of fitness. Thereby, it is proved that the rationality - selecting the optimal strategies in a fixed environment - is the goal of evolution.