On Random Matrices
On Random Matrices
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关于随机矩阵
DOI:
10.1137/1112034
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发表时间:
1967
影响因子:
0.6
通讯作者:
G. V. Balakin
中科院分区:
文献类型:
--
作者:
G. V. Balakin
By K6nig’s theorem [2], the minimal number of lines containing all the units is equal to the maximal possible number of units in independent positions. Moreover, these lines may be chosen in a unique way so that among them they contain the least number of rows or columns. The quantity B (n i, n l, x) is the number of matrices of dimension (n i) x (n 1) with N Inlog eXn] units, where every row and column is occupied. We choose one such matrix C. Given the matrix C, let Pl be the least number of rows among the minimal number of lines con-taining all the units, and P2 the minimal number of columns. Let p min (pl, P2) and let Qp (n i, n l, x) be the number of matrices C with min (p, P2) P. Since all the rows and columns of the matrix C are occupied, it is clear that Qo (n-i, n-l, x)= A’(n-i, n-l, x) and for the matrices C with p _> _ 1, the minimal number of lines containing all the units is less than n I. Therefore,