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arXiv 2008.02345math.RTmath.AT
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2-参数持久模可分解性的局部刻画

Local characterizations for decomposability of 2-parameter persistence modules

Magnus Bakke Botnan, Vadim Lebovici, Steve Oudot

摘要:

我们调查的存在性的充分的局部条件下,偏序集表示分解为直接和的不可分解的从一个给定的类。在我们的工作中,索引偏序集是两个全序集的乘积,对应于拓扑数据分析中的2-参数持久性的设定。我们感兴趣的不可分解性属于所谓的区间模,根据定义,它是偏序集中区间的指示表示。虽然整个类的间隔模块不承认这样的局部特征,我们表明,子类的矩形模块不承认一个,它是,在某种精确的意义上,最大的子类这样做。

英文摘要:

We investigate the existence of sufficient local conditions under which poset representations decompose as direct sums of indecomposables from a given class. In our work, the indexing poset is the product of two totally ordered sets, corresponding to the setting of 2-parameter persistence in topological data analysis. Our indecomposables of interest belong to the so-called interval modules, which by definition are indicator representations of intervals in the poset. While the whole class of interval modules does not admit such a local characterization, we show that the subclass of rectangle modules does admit one and that it is, in some precise sense, the largest subclass to do so.

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