Existence versus exploitation: the opacity of backdoors and backbones
Existence versus exploitation: the opacity of backdoors and backbones
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存在与剥削:后门和主干的不透明性
DOI:
10.1007/s13748-021-00234-6
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发表时间:
2021
影响因子:
4.2
通讯作者:
Narváez, David E.
中科院分区:
文献类型:
--
作者:
Hemaspaandra, Lane A.;Narváez, David E.
Boolean formulas often have what are known as hidden structures. We study the complexity of whether such structures (of certain sizes) exist in a formula, the complexity of getting one’s hands on the structure’s information, and whether even when in hand the information can be efficiently exploited. In particular, backdoors and backbones of Boolean formulas are important hidden structural properties. A natural goal, already in part realized, is that solver algorithms seek better performance by exploiting these structures. However, the present paper is not intended to improve the performance of SAT solvers, but rather is a cautionary tale. The theme of this paper is that there is a potential chasm between the existence of such structures in the Boolean formula and being able to effectively exploit them. This does not mean that these structures are not useful to solvers. It does mean that one must be very careful not to assume that it is computationally easy to go from the existence of information to being able to get one’s hands on it and/or being able to exploit it. We construct backdoor- and backbone-based cases where, if, such assumptions fail. For example, if, then (a) there are easily recognizable families of Boolean formulas with strong backdoors that are easy to find, yet for which it is hard to determine whether the formulas are satisfiable, and (b) there are easily recognizable sets of Boolean formulas for which it is hard to determine whether they have a large backbone.
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DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
L. Kott
通讯作者:
L. Kott
影响因子:
0.5
作者:
L. Valiant
通讯作者:
L. Valiant
DOI:
10.1007/s10817-005-9007-9
发表时间:
2005-10
期刊:
Journal of Automated Reasoning
影响因子:
--
作者:
Stefan Szeider
通讯作者:
Stefan Szeider
DOI:
10.1145/3369937
发表时间:
2012
期刊:
ACM Transactions on Computation Theory (TOCT)
影响因子:
--
作者:
E. Hemaspaandra;L. Hemaspaandra;Curtis Menton
通讯作者:
Curtis Menton
DOI:
--
发表时间:
2012
期刊:
SIGA
影响因子:
--
作者:
L. Hemaspaandra;Ryan Williams
通讯作者:
Ryan Williams