# ZarankiewiczDB,

an online database of Zarankiewicz numbers.

### Matrix for z(3,3 | 3,3)

 $I$ $I$ $\alpha$ $I$ $\alpha$ $I$ $\alpha$ $I$ $I$

$I$ is the identity and $\alpha$ is a 3-cycle. The $I$ entries form an extremal 3x3 rectangle-free matrix, showing that the finite projective plane of order 3 is sub-similar.

weight = 27, submitted by Andrew Kay on April 22nd, 2016 (link, raw)