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arXiv 1306.1032math.PR
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二维接触过程中渗流转变的Sharpness与robustness

Sharpness versus robustness of the percolation transition in 2D contact processes

J. van den Berg, J. E. Björnberg, M. Heydenreich

摘要:

我们研究了具有三种状态的接触过程的版本,并且感染的发生率取决于总体感染密度。受[17]中描述的干旱景观植被格局模型的启发,我们重点研究了这种过程在不变测度下的渗流。我们证明了渗流过渡是尖锐的(对于我们的模型之一,这需要一个合理的假设)。这表明与一系列参数值的幂律簇大小分布的“鲁棒临界行为”形式相矛盾,如[17]中所建议的。

英文摘要:

We study versions of the contact process with three states, and with infections occurring at a rate depending on the overall infection density. Motivated by a model described in [17] for vegetation patterns in arid landscapes, we focus on percolation under invariant measures of such processes. We prove that the percolation transition is sharp (for one of our models this requires a reasonable assumption). This is shown to contradict a form of 'robust critical behaviour' with power law cluster size distribution for a range of parameter values, as suggested in [17].

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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