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STACS
2001
Springer
13 years 11 months ago
A Logical Approach to Decidability of Hierarchies of Regular Star-Free Languages
We propose a new, logical, approach to the decidability problem for the Straubing and Brzozowski hierarchies based on the preservation theorems from model theory, on a theorem of ...
Victor L. Selivanov
DIAGRAMS
2008
Springer
13 years 8 months ago
Spider Diagrams of Order and a Hierarchy of Star-Free Regular Languages
Abstract. The spider diagram logic forms a fragment of constraint diagram logic and is designed to be primarily used as a diagrammatic software specification tool. Our interest is ...
Aidan Delaney, John Taylor, Simon J. Thompson
LATA
2009
Springer
14 years 1 months ago
A Kleene Theorem for Forest Languages
This paper proposes an alternative approach to the standard notion of rational (or regular) expression for tree languages. The main difference is that in the new notion we have on...
Lutz Straßburger
POPL
2004
ACM
14 years 6 months ago
Free theorems in the presence of seq
Parametric polymorphism constrains the behavior of pure functional programs in a way that allows the derivation of interesting theorems about them solely from their types, i.e., v...
Janis Voigtländer, Patricia Johann