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Abstract:
Emerging applications in machine learning have imposed the problem of monotone non-submodular maximization subject to a cardinality constraint. Meanwhile, parallelism is prevalent for large-scale optimization problems in bigdata scenario while adaptive complexity is an important measurement of parallelism since it quantifies the number of sequential rounds by which the multiple independent functions can be evaluated in parallel. For a monotone non-submodular function and a cardinality constraint, this paper devises an adaptive algorithm for maximizing the function value with the cardinality constraint through employing the generic submodularity ratio gamma to connect the monotone set function with submodularity. The algorithm achieves an approximation ratio of 1 - e-(gamma 2) - epsilon and consumes O(log(n/eta)/epsilon(2)) adaptive rounds and O(n log log (k)/epsilon(3)) oracle queries in expectation. Furthermore, when gamma=1, the algorithm achieves an approximation guarantee 1 - 1/e - epsilon, achieving the same ratio as the state-of-art result for the submodular version of the problem.
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Source :
JOURNAL OF COMBINATORIAL OPTIMIZATION
ISSN: 1382-6905
Year: 2021
Issue: 5
Volume: 43
Page: 1671-1690
1 . 0 0 0
JCR@2022
ESI Discipline: MATHEMATICS;
ESI HC Threshold:31
JCR Journal Grade:3
Cited Count:
WoS CC Cited Count: 2
SCOPUS Cited Count: 3
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 12
Affiliated Colleges: