Handbook of theoretical computer science (vol. B)
IEEE Transactions on Software Engineering - Special issue on formal methods in software practice
Stutter-invariant temporal properties are expressible without the next-time operator
Information Processing Letters
A note on a question of Peled and Wilke regarding stutter-invariant LTL
Information Processing Letters
The temporal logic of programs
SFCS '77 Proceedings of the 18th Annual Symposium on Foundations of Computer Science
Complexity of propositional projection temporal logic with star†
Mathematical Structures in Computer Science
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Peled and Wilke proved that every stutter-invariant propositional linear temporal property is expressible in Propositional Linear Temporal Logic (PLTL) without @? (next) operators. To eliminate next operators, a translation @t which converts a stutter-invariant PLTL formula @f to an equivalent formula @t(@f) not containing @? operators has been given. By @t, for any formula @?@f, where @f contains no @? operators, a formula with the length of O(4^n|@f|) is always produced, where n is the number of distinct propositions in @f, and |@f| is the number of symbols appearing in @f. Etessami presented an improved translation @t^'. By @t^', for @?@f, a formula with the length of O(nx2^n|@f|) is always produced. We further improve Etessami's result in the worst case to O(nx2^n|@f|) by providing a new translation @t^'', and we show that the worst case will never occur.