ISAAC
2005
Springer
14 years 6 months ago
2005
Springer
ISAAC
2005
Springer
14 years 6 months ago
2005
Springer
We explore the complexity of computing tilings of orthogonal polygons using colored dominoes. A colored domino is a rotatable 2 × 1 rectangle that is partitioned into two unit squ...
ISAAC
2005
Springer
14 years 6 months ago
2005
Springer
We present upper bounds on the computational power of an optical model of computation called the C2-CSM. We show that C2-CSM time is no more powerful than sequential space, thus gi...
ISAAC
2005
Springer
14 years 6 months ago
2005
Springer
In an orthogonal drawing of a planar graph G, each vertex is drawn as a point, each edge is drawn as a sequence of alternate horizontal and vertical line segments, and any two edge...
ISAAC
2005
Springer
14 years 6 months ago
2005
Springer
Abstract The 2-Interval Pattern problem is to find the largest constrained pattern in a set of 2-intervals. The constrained pattern is a subset of the given 2-intervals such that ...
ISAAC
2005
Springer
14 years 6 months ago
2005
Springer
ISAAC
2005
Springer
14 years 6 months ago
2005
Springer
We characterize the gap between time and space complexity of functions by operators and completeness. First, we introduce a new notion of operators for function complexity classes ...
ISAAC
2005
Springer
14 years 6 months ago
2005
Springer
ISAAC
2005
Springer
14 years 6 months ago
2005
Springer
ISAAC
2005
Springer
14 years 6 months ago
2005
Springer
In this paper we study the k-means clustering problem. It is well-known that the general version of this problem is NP-hard. Numerous approximation algorithms have been proposed fo...