Local and global survival for infections with recovery

Local and global survival for infections with recovery
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局部和全球感染生存率和恢复率

DOI:
10.1016/j.spa.2023.03.008
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发表时间:
2023
影响因子:
1.4
通讯作者:
Baldasso R
Baldasso R
中科院分区:
数学3区
文献类型:
--
作者:
Baldasso R

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我们建立了Kesten和Sidoravicius(Kesten和Sidoravicius,2006)的两个公开问题。粒子最初以给定的密度放置在Zd上,并以独立的连续时间随机游动的形式演化。最初放置在原点的粒子被宣布为受感染。感染瞬间传播到同一部位的健康颗粒,受感染的颗粒以阳性率变得健康。我们证明了,对于足够小的恢复率,感染过程是存活的,并且在存活的情况下无限次地访问起源。其次,我们证明了在恢复率的所有选择下,感染存活的密度参数的存在性。
We establish two open problems from Kesten and Sidoravicius (Kesten and Sidoravicius, 2006). Particles are initially placed on Z d with a given density and evolve as independent continuous-time random walks. Particles initially placed at the origin are declared as infected. Infection transmits instantaneously to healthy particles on the same site and infected particles become healthy with a positive rate. We prove that, for small enough recovery rates, the infection process survives and visits the origin infinitely many times on the event of survival. Second, we establish the existence of density parameters for which the infection survives for all choices of the recovery rate.
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