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- Joe Chaffee
- 2014

A cover (with triples) of λK n is an ordered pair (V, B) where V is an n-element set and B is a set of 3-element subsets of V called blocks such that each 2-element subset of V appears in at least λ blocks. Define The excess (sometimes called the padding) of a cover is defined to be E(B) − E(λK n), although it is often convenient to think of the excess as… (More)

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