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DM
2010
88views more  DM 2010»
13 years 7 months ago
Multidimensional generalized automatic sequences and shape-symmetric morphic words
An infinite word is S-automatic if, for all n 0, its (n+1)st letter is the output of a deterministic automaton fed with the representation of n in the numeration system S. In this...
Emilie Charlier, Tomi Kärki, Michel Rigo
JGT
2007
112views more  JGT 2007»
13 years 7 months ago
The 2-dimensional rigidity of certain families of graphs
Laman’s characterization of minimally rigid 2-dimensional generic frameworks gives a matroid structure on the edge set of the underlying graph, as was first pointed out and expl...
Bill Jackson, Brigitte Servatius, Herman Servatius
SIAMCO
2010
119views more  SIAMCO 2010»
13 years 2 months ago
On the Structure of the Minimum Time Function
A minimum time problem with a nonlinear smooth dynamics and a target satisfying an internal sphere condition is considered. Under the assumption that the minimum time T be continu...
Giovanni Colombo, Khai T. Nguyen
CAV
2007
Springer
120views Hardware» more  CAV 2007»
14 years 1 months ago
Using Counterexamples for Improving the Precision of Reachability Computation with Polyhedra
Abstract. We present an extrapolation with care set operator to accelerate termination of reachability computation with polyhedra. At the same time, a counterexample guided refine...
Chao Wang, Zijiang Yang, Aarti Gupta, Franjo Ivanc...
LICS
2009
IEEE
14 years 2 months ago
Functional Reachability
—What is reachability in higher-order functional programs? We formulate reachability as a decision problem in the setting of the prototypical functional language PCF, and show th...
C.-H. Luke Ong, Nikos Tzevelekos