The effect of combination functions on the complexity of relational Bayesian networks

Autor(es)

Maua, Denis Deratani ; Cozman, Fabio Gagliardi

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF APPROXIMATE REASONING; v. 85, p. 178-195, JUN 2017.
• Citações Web of Science: 1

Resumo

We study the complexity of inference with Relational Bayesian Networks as parameterized by their probability formulas. We show that without combination functions, inference is PP-complete, displaying the same complexity as standard Bayesian networks (this is so even when the domain is succinctly specified in binary notation). Using only maximization as combination function, we obtain inferential complexity that ranges from PP-complete to PSPACE-complete to PEXP-complete. And by combining mean and threshold combination functions, we obtain complexity classes in all levels of the counting hierarchy. We also investigate the use of arbitrary combination functions and obtain that inference is EXP-complete even under a seemingly strong restriction. Finally, we examine the query complexity of Relational Bayesian Networks (i.e., when the relational model is fixed), and we obtain that inference is complete for PP. (C) 2017 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 16/01055-1 - Aprendizagem de Modelos Probabilísticos Tratáveis e seu Uso na Classificação Multirrótulo
• Beneficiário: Denis Deratani Mauá
• Modalidade de apoio: Auxílio à Pesquisa - Regular