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AIML
2004
15 years 6 months ago
A Lower Complexity Bound for Propositional Dynamic Logic with Intersection
This paper shows that satisfiability for Propositional Dynamic Logic with Intersection is EXPSPACE-hard. The proof uses a reduction from the word problem for alternating, exponent...
Martin Lange
FSTTCS
2010
Springer
15 years 2 months ago
Beyond Hyper-Minimisation---Minimising DBAs and DPAs is NP-Complete
In this paper we study the problem of minimising deterministic automata over finite and infinite words. Deterministic finite automata are the simplest devices to recognise regular...
Sven Schewe
159
Voted
CONCUR
2012
Springer
13 years 7 months ago
Making Weighted Containment Feasible: A Heuristic Based on Simulation and Abstraction
Simulation and Abstraction Guy Avni and Orna Kupferman School of Computer Science and Engineering, Hebrew University, Israel Weighted automata map input words to real numbers and a...
Guy Avni, Orna Kupferman
STACS
1999
Springer
15 years 9 months ago
Decidability and Undecidability of Marked PCP
We show that the marked version of the Post Correspondence Problem, where the words on a list are required to di er in the rst letter, is decidable. On the other hand, PCP remains ...
Vesa Halava, Mika Hirvensalo, Ronald de Wolf
ACL
2006
15 years 6 months ago
Sinhala Grapheme-to-Phoneme Conversion and Rules for Schwa Epenthesis
This paper describes an architecture to convert Sinhala Unicode text into phonemic specification of pronunciation. The study was mainly focused on disambiguating schwa-/\/ and /a/...
Asanka Wasala, Ruvan Weerasinghe, Kumudu Gamage