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SOFSEM
2010
Springer
14 years 6 months ago
Mixing Coverability and Reachability to Analyze VASS with One Zero-Test
We study Vector Addition Systems with States (VASS) extended in such a way that one of the manipulated integer variables can be tested to zero. For this class of system, it has bee...
Alain Finkel, Arnaud Sangnier
VLDB
2012
ACM
361views Database» more  VLDB 2012»
12 years 5 months ago
Answering pattern match queries in large graph databases via graph embedding
The growing popularity of graph databases has generated interesting data management problems, such as subgraph search, shortest path query, reachability verification, and pattern ...
Lei Zou, Lei Chen 0002, M. Tamer Özsu, Dongya...
STACS
1994
Springer
14 years 1 months ago
Reachability and the Power of Local Ordering
The L ? = NL question remains one of the major unresolved problems in complexity theory. Both L and NL have logical characterizations as the sets of totally ordered ( ) structures...
Kousha Etessami, Neil Immerman
CORR
2007
Springer
151views Education» more  CORR 2007»
13 years 9 months ago
The Complexity of Games on Higher Order Pushdown Automata
Abstract. We prove an n-exptime lower bound for the problem of deciding the winner in a reachability game on Higher Order Pushdown Automata (HPDA) of level n. This bound matches th...
Thierry Cachat, Igor Walukiewicz
ICRA
2010
IEEE
148views Robotics» more  ICRA 2010»
13 years 7 months ago
Global reachability and path planning for planetary exploration with montgolfiere balloons
Aerial vehicles are appealing systems for possible future exploration of planets and moons such as Venus and Titan, because they combine extensive coverage with highresolution data...
Lars Blackmore, Yoshiaki Kuwata, Michael T. Wolf, ...