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研究生: 鄒礎揚
Tsou, Chu-Yang
論文名稱: 爆炸性折扣分支隨機漫步的位置分佈
The limiting distribution of the position in explosive discounted branching random walks
指導教授: 洪芷漪
Hong, Jyy-I
口試委員: 陳隆奇
Chen, Lung-Chi
顏如儀
Yen, Ju-Yi
學位類別: 碩士
Master
系所名稱: 理學院 - 應用數學系
Department of Mathematical Sciences
論文出版年: 2023
畢業學年度: 111
語文別: 英文
論文頁數: 23
中文關鍵詞: 分支過程爆炸型溯祖問題分支隨機漫步折扣分支隨 機漫步
外文關鍵詞: Branching Process, Explosive Case, Colascence Problem, Branching Random Wark, Discounted Branching Random Walk
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  • 在 2013 年,Athreya 和 Hong 指出,在後代子孫數目期望值大於一的分 支隨機漫步中,當 n 趨近於無窮大時,第 n 代個體位置的比例分配會收斂到 伯努利分配。同時,如果我們隨機在第 n 代中隨機挑選一個個體,在 n 越來 越大時,其位置的分配會收斂到標準常態分配。
    在這篇論文中,我們將考慮爆炸性折扣分支隨機漫步,研究第 n 代個 體的位置比例分配與任選之單一個體的位置分配在 n 趨近無窮大時的漸近 行為,並分別得到其收斂至伯努利分配與標準常態分配的結果。


    In 2013, Athreya and Hong showed that, in the supercritical and explosive regular branching random walk, the empirical distribution of the positions in the nth generation converges to a Bernoulli distribution, and the position of any randomly chosen individual in the nth generation converges to a normal distribution as n → ∞.
    In this thesis, we consider the explosive discounted branching random walk, investigate the asymptotic behaviors of the positions of the individuals in the nth generation as n → ∞, and obtain their convergence in distribution.

    中文摘要 i
    Abstract ii
    Contents iii
    1 Introduction 1
    1.1 Galton-Watsonbranchingprocess 1
    1.2 TheCoalescenceproblem 4
    1.3 BranchingRandomWalk 7
    2 The Positions in Explosive Discounted Branching Random Walks 10
    2.1 Themainresultsinthepositionproblems 10
    2.2 TheProofofTheorem2.1.1 11
    2.3 TheProofofTheorem2.1.2 14
    3 Conclusion 21
    References 23

    [1] Krishna B Athreya, Peter E Ney, and PE Ney. Branching processes. Courier Corporation, 2004.
    [2] P. L. Davies. The simple branching process: a note on convergence when the mean is infinite. Journal of Applied Probability, 15(3):466–480, 1978.
    [3] KB Athreya. Coalescence in the recent past in rapidly growing populations. Stochastic Processes and their Applications, 122(11):3757–3766, 2012.
    [4] Jui-Lin Chi and Jyy-I Hong. The range of asymmetric branching random walk. Statistics & Probability Letters, 193:109705, 2023.
    [5] KB Athreya. Branching random walks. The Legacy of Alladi Ramakrishnan in the Mathematical Sciences, pages 337–349, 2010.
    [6] Krishna B Athreya and Jyy-I Hong. An application of the coalescence theory to branching random walks. Journal of Applied Probability, 50(3):893–899, 2013.

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