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» New Plain-Exponential Time Classes for Graph Homomorphism
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IPPS
1995
IEEE
14 years 3 days ago
Performance evaluation of a new parallel preconditioner
The linear systems associated with large, sparse, symmetric, positive definite matrices are often solved iteratively using the preconditioned conjugate gradient method. We have d...
Keith D. Gremban, Gary L. Miller, Marco Zagha
PODS
1994
ACM
138views Database» more  PODS 1994»
14 years 19 days ago
Dyn-FO: A Parallel, Dynamic Complexity Class
Traditionally, computational complexity has considered only static problems. Classical Complexity Classes such as NC, P, and NP are de ned in terms of the complexity of checking {...
Sushant Patnaik, Neil Immerman
AIPS
2007
13 years 11 months ago
On the Hardness of Planning Problems with Simple Causal Graphs
We present three new complexity results for classes of planning problems with simple causal graphs. First, we describe a polynomial time algorithm that uses macros to generate pla...
Omer Giménez, Anders Jonsson
ICRA
2000
IEEE
88views Robotics» more  ICRA 2000»
14 years 29 days ago
Incremental Optimization of Cyclic Timed Event Graphs
In this paper we deal with the problem of allocating a given number of tokens, so as to maximize the firing rate of a cyclic event graph with deterministic transition firing delay...
Alessandro Giua, Aldo Piccaluga, Carla Seatzu
ICPP
1995
IEEE
14 years 3 days ago
Multilevel Graph Partitioning Schemes
– In this paper we present experiments with a class of graph partitioning algorithms that reduce the size of the graph by collapsing vertices and edges, partition the smaller gra...
George Karypis, Vipin Kumar