Semi-optimal bases for linear dependencies
Semi-optimal bases for linear dependencies
复制标题
线性依赖的半最优基
DOI:
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发表时间:
1985
期刊:
影响因子:
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通讯作者:
D. E. Knuth
中科院分区:
文献类型:
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作者:
D. E. Knuth
Let A be an m × n matrix of real or complex numbers, and let μ. be a given constant ≥ 1. If A has rank m, it is possible to choose m columns of A such that, if B is the m × m matrix formed by these m columns, all entries of B −1 A are less than or equal to μ in absolute value. Moreover, if μ > 1, it is possible to find m such columns in a number of steps that is polynomial in m and n and inversely proportional to log μ.