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FUIN
2002
90views more  FUIN 2002»
14 years 11 months ago
A Direct Construction of a Universal P System
We present a direct universal P system based on splicing. Our approach differs from those shown in previous papers as the P system we construct takes as input an encoding of anothe...
Pierluigi Frisco, Hendrik Jan Hoogeboom, Paul Sant
MST
2007
90views more  MST 2007»
14 years 11 months ago
Optimal Semicomputable Approximations to Reachable and Invariant Sets
In this paper we consider the computation of reachable, viable and invariant sets for discrete-time systems. We use the framework of type-two effectivity, in which computations a...
Pieter Collins
MST
2011
182views Hardware» more  MST 2011»
14 years 6 months ago
Tilings and Submonoids of Metabelian Groups
Abstract. In this paper we show that membership in finitely generated submonoids is undecidable for the free metabelian group of rank 2 and for the wreath product Z ≀ (Z × Z). ...
Markus Lohrey, Benjamin Steinberg
POPL
2008
ACM
16 years 3 days ago
A logical account of pspace
We propose a characterization of PSPACE by means of a type assignment for an extension of lambda calculus with a conditional construction. The type assignment STAB is an extension...
Marco Gaboardi, Jean-Yves Marion, Simona Ronchi De...
UC
2009
Springer
15 years 6 months ago
Abstract Geometrical Computation and Computable Analysis
Geometrical Computation and Computable Analysis J´erˆome Durand-Lose⋆ Laboratoire d’Informatique Fondamentale d’Orl´eans, Universit´e d’Orl´eans, B.P. 6759, F-45067 OR...
Jérôme Durand-Lose