|Optimal Multistage Group Testing Algorithm for 3 Defectives
|Ilya Vorobyev, Skolkovo Institute of Science and Technology, Russia
|A.3: Combinatorics and Information Theory
|Algebraic and Combinatorial Coding Theory
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|Group testing is a well-known search problem that consists in detecting of $s$ defective members of a set of $t$ samples by carrying out tests on properly chosen subsets of samples. In classical group testing the goal is to find all defective elements by using the minimal possible number of tests in the worst case. In this work, a multistage group testing problem is considered. Our goal is to construct a multistage search procedure, having asymptotically the same number of tests as the optimal adaptive algorithm. We propose a new approach to designing multistage algorithms, which allows us to construct a 5-stage algorithm for finding 3 defectives with the optimal number $3\log_2t(1+o(1))$ of tests.