Genetic Algorithm (GA) has a property, which prompts evolution of superior individuals by weeding out others under standards of estimation. So, GA is weak in evolution of altruistic behavior. We used an selection algorithm based on the theory called "Kin-selection", which is a popular rationale of altruistic behavior. Efficacy of this algorithm was confirmed by simulation of a model, which sending signal and communication among a group regards as altruistic behavior. As a result, a group had consisted of some subgroups of individuals who has the same property and signal pattern to communicate among a subgroup.
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