한국수학교육학회지시리즈A:수학교육 (The Mathematical Education)
- 제25권3호
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- Pages.57-69
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- 1987
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- 1225-1380(pISSN)
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- 2287-9633(eISSN)
Posets Related to Some Association Schemes
초록
A geometric interpretation of t-designs, in the context of posets, is given in the association scheme, not isomorphic with the Hamming scheme H(2,4), but having the same parameters as H(2,4). It is also shown that there is no similar poset which characterizes the designs for ally of the three exceptional association schemes, not isomorphic with the Johnson scheme J(8,2), but having the same parameters as J(8,2).
키워드