We prove that the matrix obtained by deleting a row of the incidence matrix of the projective plane of order 2 is 2-separable. We also prove that there is no 2-separable s×t matrix with s< t< 7.
Tsai, S. F. (2005). 雙染色點印微陣列A-最適設計之研究 - 使用技術性重複之實驗 [master's thesis, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2005.01726