Isometric copies of l n ∞ and l n 1 in transportation cost spaces on finite metric spaces

Isometric copies of l n ∞ and l n 1 in transportation cost spaces on finite metric spaces
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有限度量空间上的运输成本空间中 l n ∞ 和 l n 1 的等距副本

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发表时间:
2019
期刊:
影响因子:
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通讯作者:
M. Ostrovskii
M. Ostrovskii
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文献类型:
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作者:
Seychelle S. Khan;M. Mim;M. Ostrovskii

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对这个函数的一个自然而重要的解释如下:f(v) > 0表示某种产品的f(v)个单位在点v生产或储存;f(v) < 0表示在v处需要(−f(v))个相同积的单位,单位的数目可以是任意实数。考虑到这一点,它可以被视为一个运输问题。因此,我们用TP(M)表示M上有限支持的所有实值函数的零和向量空间,其中TP代表运输问题。向量空间TP(M)上的一个标准规范与运输成本有关,定义如下:
A natural and important interpretation of such a function is the following: f(v) > 0 means that f(v) units of a certain product are produced or stored at point v; f(v) < 0 means that (−f(v)) units of the same product are needed at v. The number of units can be any real number. With this in mind, f may be regarded as a transportation problem. For this reason, we denote the vector space of all real-valued functions finitely supported on M with a zero sum by TP(M), where TP stands for transportation problems. One of the standard norms on the vector space TP(M) is related to the transportation cost and is defined in the following way.
有限度量空间上的利普希茨自由空间
DOI: 10.4153/s0008414x19000087
发表时间: 2020
期刊: Canadian Journal of Mathematics
影响因子: --
作者:
Dilworth, Stephen J.;Kutzarova, Denka;Ostrovskii, Mikhail I.
通讯作者: Ostrovskii, Mikhail I.