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Counting f such that f o g = g o f |
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| Authors: | P. Bouchard Y. Fong W. F. Ke Y. N. Yeh |
| Affiliation: | 1. Département de math. et d’informatique, Université du Québec à Montrél, C.P. 8888, Succursale A, Montrél, Québec, Canada, H3C 3P8 2. Department of Mathematics, National Cheng Kung University, Tainan, Taiwan 701, ROC 3. Institute of Mathematics, Academia Sinica Nankang, Taipei, Taiwan, 11529, ROC |
| Abstract: | In this paper, we derive an algorithm for finding all the mappings f of a finite set A which commute with a fixed mapping g: A → A. This algorithm is then applied to finding all the infra-endomorphisms of the groups ?n and Dn. |
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