由多项拟阵函数f所确定的拟阵Mf的秩rf
Science Technology and Engineering（2011）
Abstract
研究由多项拟阵函数f所确定的拟阵的秩函数r<,f>.先给出由次模函数所确定的拟阵M<,f>,然后导出多项拟阵函数的秩函数r<,f>的表示式.由此证明了多项拟阵函数f的两个性质,讨论了由二部图导出拟阵M(Δ)的独立集I(Δ)和秩函数r<,f>(Δ)的表示.
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Key words
polymatroid function rank submodular function f-balanced set independent set bipartite graph associated with A(J)
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