Pilipczuk, Marcin and Sorge, Manuel - A Double Exponential Lower Bound for the Distinct Vectors Problem

dmtcs:6072 - Discrete Mathematics & Theoretical Computer Science, September 18, 2020, vol. 22 no. 4
A Double Exponential Lower Bound for the Distinct Vectors Problem

Authors: Pilipczuk, Marcin and Sorge, Manuel

In the (binary) Distinct Vectors problem we are given a binary matrix A with pairwise different rows and want to select at most k columns such that, restricting the matrix to these columns, all rows are still pairwise different. A result by Froese et al. [JCSS] implies a 2^2^(O(k)) * poly(|A|)-time brute-force algorithm for Distinct Vectors. We show that this running time bound is essentially optimal by showing that there is a constant c such that the existence of an algorithm solving Distinct Vectors with running time 2^(O(2^(ck))) * poly(|A|) would contradict the Exponential Time Hypothesis.


Volume: vol. 22 no. 4
Section: Discrete Algorithms
Published on: September 18, 2020
Submitted on: February 5, 2020
Keywords: Computer Science - Computational Complexity,Computer Science - Discrete Mathematics


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