On quasi-3 designs and spin models

Discrete Mathematics（2005）

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摘要

A theorem of Bannai and Sawano shows that certain four-weight spin models exist if and only if certain quasi-3 designs exist. We verify that the known quasi-3 designs, other than SDP designs, do not give rise to four-weight spin models.

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关键词

57m27,symmetric design,05b05,spin model,quasi-3 design

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