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ECEASST
2010
14 years 11 months ago
Checking Graph-Transformation Systems for Confluence
d Abstract) Detlef Plump Abstract. In general, it is undecidable whether a terminating graphtransformation system is confluent or not. We introduce the class of coverable hypergrap...
Detlef Plump
COCOA
2007
Springer
15 years 7 months ago
Steiner Forests on Stochastic Metric Graphs
We consider the problem of connecting given vertex pairs over a stochastic metric graph, each vertex of which has a probability of presence independently of all other ver
Vangelis Th. Paschos, Orestis Telelis, Vassilis Zi...
COMPGEOM
2004
ACM
15 years 7 months ago
On lines avoiding unit balls in three dimensions
Let B be a set of n unit balls in R3 . We show that the combinatorial complexity of the space of lines in R3 that avoid all the balls of B is O(n3+ε ), for any ε > 0. This re...
Pankaj K. Agarwal, Boris Aronov, Vladlen Koltun, M...
COMPGEOM
2004
ACM
15 years 7 months ago
Solution of Scott's problem on the number of directions determined by a point set in 3-space
Let P be a set of n points in Ê3 , not all in a common plane. We solve a problem of Scott (1970) by showing that the connecting lines of P assume at least 2n − 7 different dir...
János Pach, Rom Pinchasi, Micha Sharir
AAECC
2003
Springer
119views Algorithms» more  AAECC 2003»
15 years 6 months ago
Optimal 2-Dimensional 3-Dispersion Lattices
We examine 2-dimensional 3-dispersion lattice interleavers in three connectivity models: the rectangular grid with either 4 or 8 neighbors, and the hexagonal grid. We provide tight...
Moshe Schwartz, Tuvi Etzion