ZarankiewiczDB,

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z(5,7) = 15

By the convex optimisation bound with 3 columns of weight 2 and 4 columns of weight 3.

upper bound = 15, submitted on April 22nd, 2016 (link)

Delete two rows from the Fano plane.

lower bound = 15, submitted on April 22nd, 2016 (link)

By adding a column of weight 1 to z(5,6).

lower bound = 15, submitted on April 22nd, 2016 (link)

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