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- W4381586670 abstract "Critical birth-death processes with $n$ distinct types are investigated. Each type $i$ cell divides independently $(i)to(i)+(i)$ or mutates $(i)to(i+1)$ at the same rate. The total number of cells grows exponentially as a Yule process until the maximal type $n$ cells appear, which cannot mutate but die at rate one. The last type makes the process critical and hence after the exponentially growing phase eventually all cells die with probability one. The process mimics the accumulation of mutations in a growing population where too many mutations are lethal. This has applications for understanding the mutational burden and so-called error catastrophe in cancer, bacteria, or virus. We present large-time asymptotic results for the general $n$-type critical birth-death process. We find that the mass function of the number of cells of type $k$ has algebraic and stationary tail $(text{size})^{-1-chi_k}$, with $chi_k=2^{1-k}$, for $k=2,dots,n$, in sharp contrast to the exponential tail of the first type. The same exponents describe the tail of the asymptotic survival probability $(text{time})^{-chi_n}$. We discuss the consequences and applications of the results for studying extinction due to mutational burden in biological populations." @default.
- W4381586670 created "2023-06-22" @default.
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- W4381586670 date "2023-06-20" @default.
- W4381586670 modified "2023-09-25" @default.
- W4381586670 title "Multi-type critical process: a birth-death model of error catastrophe" @default.
- W4381586670 doi "https://doi.org/10.48550/arxiv.2306.11609" @default.
- W4381586670 hasPublicationYear "2023" @default.
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