On integer matrices obeying certain matrix equations
نویسندگان
چکیده
منابع مشابه
On Integer Matrices Obeying Certain Matrix Equations
We discuss integer matrices B of odd order v which satisfy Br = ± B, BBr = vI J, BJ = O. Matrices of this kind which have zero diagonal and other elements ± 1 give rise to skew-Hadamard and n-type matrices; we show that the existence of a skew-Hadamard (n-type) matrix of order h implies the existence of skew-Hadamard (n-type) matrices of orders (h 1)5 + 1 and (h 1)7 + 1. Finally we show that, a...
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ژورنال
عنوان ژورنال: Journal of Combinatorial Theory, Series A
سال: 1972
ISSN: 0097-3165
DOI: 10.1016/0097-3165(72)90087-8