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TAMC
2009
Springer
15 years 1 months ago
Feasibility of Motion Planning on Directed Graphs
Because of irreversibility of movements, motion planning on directed graphs is much more intricate than that on graphs. Recently we showed that the feasibility of motion planning o...
Zhilin Wu, Stéphane Grumbach
LICS
2008
IEEE
15 years 3 months ago
Piecewise Testable Tree Languages
— This paper presents a decidable characterization of tree languages that can be defined by a boolean combination of Σ1 formulas. This is a tree extension of the Simon theorem,...
Mikolaj Bojanczyk, Luc Segoufin, Howard Straubing
FSTTCS
2007
Springer
15 years 3 months ago
Post Embedding Problem Is Not Primitive Recursive, with Applications to Channel Systems
We introduce PEP, the Post Embedding Problem, a variant of PCP where one compares strings with the subword relation, and PEPreg , a further variant where solutions are constrained ...
Pierre Chambart, Ph. Schnoebelen
LPAR
2010
Springer
14 years 7 months ago
Infinite Families of Finite String Rewriting Systems and Their Confluence
We introduce parameterized rewrite systems for describing infinite families of finite string rewrite systems depending upon non-negative integer parameters, as well as ways to reas...
Jean-Pierre Jouannaud, Benjamin Monate
ESOP
2001
Springer
15 years 1 months ago
On the Complexity of Constant Propagation
Constant propagation (CP) is one of the most widely used optimizations in practice (cf. [9]). Intuitively, it addresses the problem of statically detecting whether an expression al...
Markus Müller-Olm, Oliver Rüthing