Quickest online selection of an increasing subsequence of specified size

被引:5
|
作者
Arlotto, Alessandro [1 ]
Mossel, Elchanan [2 ]
Steele, J. Michael [3 ]
机构
[1] Duke Univ, Fuqua Sch Business, 100 Fuqua Dr, Durham, NC 27708 USA
[2] Univ Penn, Dept Stat, Wharton Sch, Huntsman Hall 459, Philadelphia, PA 19104 USA
[3] Univ Penn, Wharton Sch, Dept Stat, Huntsman Hall 447, Philadelphia, PA 19104 USA
基金
美国国家科学基金会;
关键词
increasing subsequence problem; online selection; sequential selection; time-focused decision problem; dynamic programming; Markov decision problem; OPTIMAL SEQUENTIAL SELECTION; CENTRAL-LIMIT-THEOREM; MONOTONE SUBSEQUENCES; RANDOM-VARIABLES; SUM CONSTRAINT; RANDOM SAMPLE; LENGTH;
D O I
10.1002/rsa.20634
中图分类号
TP31 [计算机软件];
学科分类号
081202 ; 0835 ;
摘要
Given a sequence of independent random variables with a common continuous distribution, we consider the online decision problem where one seeks to minimize the expected value of the time that is needed to complete the selection of a monotone increasing subsequence of a prespecified length n. This problem is dual to some online decision problems that have been considered earlier, and this dual problem has some notable advantages. In particular, the recursions and equations of optimality lead with relative ease to asymptotic formulas for mean and variance of the minimal selection time. (c) 2016 Wiley Periodicals, Inc. Random Struct. Alg., 49, 235-252, 2016
引用
收藏
页码:235 / 252
页数:18
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