Computer Science Logic: 16th International Workshop, CSL by Susumu Hayashi, Yohji Akama (auth.), Julian Bradfield (eds.)

By Susumu Hayashi, Yohji Akama (auth.), Julian Bradfield (eds.)

The Annual convention of the ecu organization for desktop technology good judgment, CSL 2002, used to be held within the previous collage of the college of Edinburgh on 22–25 September 2002. The convention sequence began as a programme of Int- nationwide Workshops on desktop technology good judgment, after which in its 6th assembly turned the yearly convention of the EACSL. This convention used to be the 16th assembly and 11th EACSL convention; it was once geared up by way of the Laboratory for Foundations of machine technological know-how on the college of Edinburgh. The CSL 2002 Programme Committee thought of 111 submissions from 28 international locations in the course of a week digital dialogue; each one paper used to be refereed via a minimum of 3 reviewers. The Committee chosen 37 papers for presentation on the convention and book in those complaints. The Programme Committee invited lectures from Susumu Hayashi, Frank Neven, and Damian Niwinski; ´ the papers supplied by way of the invited audio system seem on the entrance of this quantity. as well as the most convention, tutorials – ‘Introduction to Mu- Calculi’ (Julian Brad?eld) and ‘Parametrized Complexity’ (Martin Grohe) – got at the earlier day.

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Additional info for Computer Science Logic: 16th International Workshop, CSL 2002 11th Annual Conference of the EACSL Edinburgh, Scotland, UK, September 22–25, 2002 Proceedings

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DTWAs extended with single-valued registers capture logspace; 2. DTWAs extended with single-valued registers and subcomputations capture ptime; 3. DTWAs extended with relational storage capture pspace; and, 4. DTWAs extended with relational storage and subcomputations capture exptime. Actually, the above characterizations are not obtained for the mentioned standard complexity classes but for a Turing Machine model directly operating on attributed trees. It can be shown that the latter and the standard model recognize the same class of tree languages.

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A change of the relational storage: α = (q , ψ, i) where q is a state, ψ an FO formula over the relational storage and the attribute values of the current node, and i is the number of a register. The intended meaning is that the content of register i is replaced by the relation defined by ψ; 3. a subcomputation: α = (q , atp(ϕ(x, y), p), i), where q , p are states, i is the number of a register and ϕ(x, y) is an FO(∃) formula over the tree (extended with some other predicates). The logic FO(∃) functions as an abstraction of XPath.

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