作者: Norihide Tokushige , Akimichi Takemura , Hidehiko Kamiya , N. Tokushige
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摘要: Arrangement theory plays an essential role in the study of unfolding model used many fields. This paper describes how arrangement can be usefully employed solving problems counting (i) number admissible rankings and (ii) ranking patterns generated by models. The is mostly expository but also contains some new results such as simple upper lower bounds for unidimensional case.