arXiv
Open Access
2009
On Pebble Automata for Data Languages with Decidable Emptiness Problem
Tony Tan
Abstrak
In this paper we study a subclass of pebble automata (PA) for data languages for which the emptiness problem is decidable. Namely, we introduce the so-called top view weak PA. Roughly speaking, top view weak PA are weak PA where the equality test is performed only between the data values seen by the two most recently placed pebbles. The emptiness problem for this model is decidable. We also show that it is robust: alternating, nondeterministic and deterministic top view weak PA have the same recognition power. Moreover, this model is strong enough to accept all data languages expressible in Linear Temporal Logic with the future-time operators, augmented with one register freeze quantifier.
Topik & Kata Kunci
Penulis (1)
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Tony Tan
Akses Cepat
Informasi Jurnal
- Tahun Terbit
- 2009
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓