A continuous-time MaxSAT solver with high analog performance.
A continuous-time MaxSAT solver with high analog performance.
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DOI:
10.1038/s41467-018-07327-2
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发表时间:
2018-11-19
影响因子:
16.6
通讯作者:
Ercsey-Ravasz M
中科院分区:
文献类型:
--
作者:
Molnár B;Molnár F;Varga M;Toroczkai Z;Ercsey-Ravasz M
Many real-life optimization problems can be formulated in Boolean logic as MaxSAT, a class of problems where the task is finding Boolean assignments to variables satisfying the maximum number of logical constraints. Since MaxSAT is NP-hard, no algorithm is known to efficiently solve these problems. Here we present a continuous-time analog solver for MaxSAT and show that the scaling of the escape rate, an invariant of the solver’s dynamics, can predict the maximum number of satisfiable constraints, often well before finding the optimal assignment. Simulating the solver, we illustrate its performance on MaxSAT competition problems, then apply it to two-color Ramsey number R(m, m) problems. Although it finds colorings without monochromatic 5-cliques of complete graphs on N ≤ 42 vertices, the best coloring for N = 43 has two monochromatic 5-cliques, supporting the conjecture that R(5, 5) = 43. This approach shows the potential of continuous-time analog dynamical systems as algorithms for discrete optimization. Continuous-time computation paradigm could represent a viable alternative to the standard digital one when dealing with certain classes of problems. Here, the authors propose a generalised version of a continuous-time solver and simulate its performances in solving MaxSAT and two-colour Ramsey problems.
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影响因子:
4.6
作者:
Ercsey-Ravasz, Maria;Toroczkai, Zoltan
通讯作者:
Toroczkai, Zoltan
DOI:
10.1007/978-3-540-24605-3_37
发表时间:
2004-01-01
期刊:
THEORY AND APPLICATIONS OF SATISFIABILITY TESTING
影响因子:
--
作者:
Eén, N;Sörensson, N
通讯作者:
Sörensson, N
DOI:
10.1088/0305-4470/15/10/028
发表时间:
1982-01-01
期刊:
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
影响因子:
--
作者:
BARAHONA, F
通讯作者:
BARAHONA, F
影响因子:
7.2
作者:
Ahmad, Siti Halimah;Jamil, Siti Munira;Ismail, Ahmad Fauzi
通讯作者:
Ismail, Ahmad Fauzi
影响因子:
3.5
作者:
FRAENKEL, AS
通讯作者:
FRAENKEL, AS