Hostname: page-component-74656f9884-npj9w Total loading time: 0 Render date: 2026-11-09T09:08:19.425Z Has data issue: false hasContentIssue false

Complexity of propositional projection temporal logic with star†

Published online by Cambridge University Press:  01 February 2009

CONG TIAN
Affiliation:
Institute of Computing Theory and Technology, Xidian University, Xi'an, 710071, P. R. China
ZHENHUA DUAN*
Affiliation:
Institute of Computing Theory and Technology, Xidian University, Xi'an, 710071, P. R. China
*
‡Corresponding author.
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

This paper investigates the complexity of Propositional Projection Temporal Logic with Star (PPTL*). To this end, Propositional Projection Temporal Logic (PPTL) is first extended to include projection star. Then, by reducing the emptiness problem of star-free expressions to the problem of the satisfiability of PPTL* formulas, the lower bound of the complexity for the satisfiability of PPTL* formulas is proved to be non-elementary. Then, to prove the decidability of PPTL*, the normal form, normal form graph (NFG) and labelled normal form graph (LNFG) for PPTL* are defined. Also, algorithms for transforming a formula to its normal form and LNFG are presented. Finally, a decision algorithm for checking the satisfiability of PPTL* formulas is formalised using LNFGs.

Information

Type
Paper
Copyright
Copyright © Cambridge University Press 2009