# Computer Science Logic: 23rd international Workshop, CSL by Mikołaj Bojańczyk (auth.), Erich Grädel, Reinhard Kahle

By Mikołaj Bojańczyk (auth.), Erich Grädel, Reinhard Kahle (eds.)

The annual convention of the ecu organization for desktop technological know-how good judgment (EACSL), CSL 2009, was once held in Coimbra (Portugal), September 7–11, 2009. The convention sequence began as a programme of overseas Workshops on machine technology good judgment, after which at its 6th assembly turned the yearly C- ference of the EACSL. This convention was once the twenty third assembly and 18th EACSL convention; it used to be equipped on the division of arithmetic, college of S- ence and expertise, college of Coimbra. in accordance with the decision for papers, a complete of 122 abstracts have been submitted to CSL 2009of which 89 werefollowedby an entire paper. The ProgrammeCommittee chosen 34 papers for presentation on the convention and e-book in those complaints. The Ackermann Award is the EACSL notable Dissertation Award for common sense in laptop technological know-how. The awardrecipient for 2009 was once Jakob Nordstr¨ om. quotation of the award, summary of the thesis, and a biographical cartoon of the recipient should be discovered on the finish of the court cases. The award was once backed for the years 2007–2009 through Logitech S.A.

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**Extra info for Computer Science Logic: 23rd international Workshop, CSL 2009, 18th Annual Conference of the EACSL, Coimbra, Portugal, September 7-11, 2009. Proceedings**

**Example text**

Intuitively CP + C may be viewed as a version of FP + C where quantiﬁcation and ﬁxed-point operators not only range over elements of a structure, but instead over all objects that can be described by O(log n) bits, where n is the size of the structure. This intuition can be formalised in an expansion of a structure by all hereditarily ﬁnite sets which use the elements of the structure as atoms. The logic FP + R, introduced recently in [7], is an extension of FP by an operator that determines the rank of deﬁnable matrices in a structure.

Springer, Heidelberg (1990) 21. : PTIME queries revisited. , Libkin, L. ) ICDT 2005. LNCS, vol. 3363, pp. 274–288. Springer, Heidelberg (2004) 22. : Bisimulation-invariant PTIME and higher-dimensional µ-calculus. Theoretical Computer Science 224, 237–265 (1999) 23. : The complexity of relational query languages. In: Proceedings of the 14th ACM Symposium on Theory of Computing, pp. 137–146 (1982) Kleene’s Amazing Second Recursion Theorem (Extended Abstract) Yiannis N. edu This little gem is stated unbilled and proved (completely) in the last two lines of §2 of the short note Kleene (1938).

Complexity of Computation, SIAM-AMS Proceedings, vol. 7, pp. 43–73 (1974) 10. : Finite Model Theory and Descriptive Complexity. , Weinstein, S. ) Finite Model Theory and Its Applications, ch. 3, pp. 125–230. Springer, Heidelberg (2007) 11. : Fixed-point logics on planar graphs. In: Proceedings of the 13th IEEE Symposium on Logic in Computer Science, pp. 6–15 (1998) 12. : Definable tree decompositions. In: Proceedings of the 23rd IEEE Symposium on Logic in Computer Science, pp. 406–417 (2008) 13.