科研之友
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摘要
We prove an upper bound on sums of squares of minors of {+1, -1}-matrices. The bound is sharp for Hadamard matrices, a result due to de Launey and Levin [%26apos;(1, -1)-matrices with near-extremal properties%26apos;, SIAM J. Discrete Math. 23 (2009), 1422-1440], but our proof is simpler. We give several corollaries relevant to minors of Hadamard matrices.
- 出版日期2013-10
