On the generation of alternative explanations with implications for belief revision
Proceedings of the seventh conference (1991) on Uncertainty in artificial intelligence
Artificial Intelligence - Special volume on natural language processing
Efficient probabilistically checkable proofs and applications to approximations
STOC '93 Proceedings of the twenty-fifth annual ACM symposium on Theory of computing
A linear constraint satisfaction approach to cost-based abduction
Artificial Intelligence
Cost-based abduction and MAP explanation
Artificial Intelligence
The complexity of logic-based abduction
Journal of the ACM (JACM)
Polynomial solvability of cost-based abduction
Artificial Intelligence
Artificial Intelligence - Special issue: artificial intelligence research in Japan
STOC '97 Proceedings of the twenty-ninth annual ACM symposium on Theory of computing
An algorithm for finding MAPs for belief networks through cost-based abduction
Artificial Intelligence
Cost-based abduction using binary decision diagrams
IEA/AIE '99 Proceedings of the 12th international conference on Industrial and engineering applications of artificial intelligence and expert systems: multiple approaches to intelligent systems
Computers and Intractability: A Guide to the Theory of NP-Completeness
Computers and Intractability: A Guide to the Theory of NP-Completeness
Parallel Cost-based Abductive Reasoning for Distributed Memory Systems
PRICAI '96 Proceedings of the 4th Pacific Rim International Conference on Artificial Intelligence: Topics in Artificial Intelligence
PRICAI '98 Proceedings of the 5th Pacific Rim International Conference on Artificial Intelligence: Topics in Artificial Intelligence
PRICAI '02 Proceedings of the 7th Pacific Rim International Conference on Artificial Intelligence: Trends in Artificial Intelligence
Abductive reasoning with recurrent neural networks
Neural Networks - 2003 Special issue: Advances in neural networks research IJCNN'03
Generalized chart algorithm: an efficient procedure for cost-based abduction
ACL '94 Proceedings of the 32nd annual meeting on Association for Computational Linguistics
Neural Networks - 2005 Special issue: IJCNN 2005
Solving abduction by computing joint explanations
Annals of Mathematics and Artificial Intelligence
Using membrane computers to find optimal solutions to cost-based abduction
PDCS '07 Proceedings of the 19th IASTED International Conference on Parallel and Distributed Computing and Systems
Approximate model-based diagnosis using greedy stochastic search
Journal of Artificial Intelligence Research
FoIKS'06 Proceedings of the 4th international conference on Foundations of Information and Knowledge Systems
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Cost-based abduction (CBA) is an important problem in reasoning under uncertainty. Finding Least-Cost Proofs (LCPs) for CBA systems is known to be NP-hard and has been a subject of considerable research over the past decade. In this paper, we show that approximating LCPs, within a fixed ratio bound of the optimal solution, is NP-hard, even for quite restricted subclasses of CBAs. We also consider a related problem concerned with the fine-tuning of a CBA's cost function.