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Patterson P 《OR manager》1996,12(12):1, 8-1, 9
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《OR manager》2003,19(11):1, 9-1,10
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The smallest number of points of an incidence structure which is self-dual but not self-polar is 7. For non-binary structures (where a “point” may occur more than once in a “block”) the number is 6. 相似文献
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