Lütolf, Christine; Margot, François - In: Mathematical Methods of Operations Research 47 (1998) 2, pp. 221-241
This paper describes a backtracking algorithm for the enumeration of nonisomorphic minimally nonideal (n ×n) matrices … that are not degenerate projective planes. The application of this algorithm forn ≤ 12 yielded 20 such matrices, adding 5 … matrices to the 15 previously known. For greater dimensions,n=14 andn=17, 13 new matrices are given. For nonsquare matrices, 38 …