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» The Complexity of Timetable Construction Problems
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TCAD
2008
128views more  TCAD 2008»
14 years 11 months ago
Obstacle-Avoiding Rectilinear Steiner Tree Construction Based on Spanning Graphs
Given a set of pins and a set of obstacles on a plane, an obstacle-avoiding rectilinear Steiner minimal tree (OARSMT) connects these pins, possibly through some additional points (...
Chung-Wei Lin, Szu-Yu Chen, Chi-Feng Li, Yao-Wen C...
DAM
2002
125views more  DAM 2002»
14 years 11 months ago
Complexity of Langton's ant
The virtual ant introduced by Langton [Physica D 22 (1986) 120] has an interesting behavior, which has been studied in several contexts. Here we give a construction to calculate a...
Anahí Gajardo, Andrés Moreira, Eric ...
ECCC
2002
103views more  ECCC 2002»
14 years 11 months ago
Monotone complexity and the rank of matrices
We shall give simpler proofs of some lower bounds on monotone computations. We describe a simple condition on combinatorial structures, such that the rank of the matrix associated...
Pavel Pudlák
CLASSIFICATION
2006
103views more  CLASSIFICATION 2006»
14 years 12 months ago
On the Complexity of Ordinal Clustering
Abstract. Given a set of pairwise distances on a set of n points, constructing an edge-weighted tree whose leaves are these n points such that the tree distances would mimic the or...
Rahul Shah, Martin Farach-Colton
ISTA
2007
15 years 1 months ago
Knowledge-Oriented Approach to the Main Pipeline Complex Dispatching Control
: The article is devoted to the development of knowledge-oriented models that are able to increase the efficiency and quality of main pipeline complex (MPC) dispatching control. Th...
O. Ye. Fedorovich, A. V. Prokhorov, K. V. Golovan