Characteristic polynomials of incidence matrices
Tài liệu tham khảo
Bruck, 1949, The Non-existence of Certain Finite Projective Planes, Canad. J. Math., 1, 88, 10.4153/CJM-1949-009-2
Chowla, 1950, Combinatorial Problems, Canad. J. Math., 2, 93, 10.4153/CJM-1950-009-8
Goldhaber, 1967, A Note Concerning Subspaces Invariant under an Incidence Matrix, J. Algebra, 7, 389, 10.1016/0021-8693(67)90078-6
Hall, 1965
Hoffman, 1956, On the Number of Absolute Points of a Correlation, Pacific J. Math., 6, 83, 10.2140/pjm.1956.6.83
Jones, 1950
Ryser, 1963
