Sciweavers

2569 search results - page 31 / 514
» Approximate Objects and Approximate Theories
Sort
View
ISAAC
2007
Springer
124views Algorithms» more  ISAAC 2007»
15 years 6 months ago
Approximating the Crossing Number of Toroidal Graphs
Abstract. CrossingNumber is one of the most challenging algorithmic problems in topological graph theory, with applications to graph drawing and VLSI layout. No polynomial time con...
Petr Hlinený, Gelasio Salazar
RSCTC
2004
Springer
157views Fuzzy Logic» more  RSCTC 2004»
15 years 5 months ago
Rough Approximations under Level Fuzzy Sets
The combination of fuzzy set and rough set theories lead to various models. Functional and set approaches are two categories based on different fuzzy representations. In this pape...
W.-N. Liu, Jingtao Yao, Yiyu Yao
IJAR
2008
82views more  IJAR 2008»
14 years 11 months ago
Probabilistic rough set approximations
This paper reviews probabilistic approaches to rough sets in granulation, approximation, and rule induction. The Shannon entropy function is used to quantitatively characterize pa...
Yiyu Yao
DEXA
2004
Springer
136views Database» more  DEXA 2004»
15 years 5 months ago
A Framework for Representing Moving Objects
We present a framework for representing the trajectories of moving objects and the time-varying results of operations on moving objects. This framework supports the realization of ...
Ludger Becker, Henrik Blunck, Klaus Hinrichs, Jan ...
FOCS
2004
IEEE
15 years 3 months ago
Hardness of Approximating the Shortest Vector Problem in Lattices
Let p > 1 be any fixed real. We show that assuming NP RP, there is no polynomial time algorithm that approximates the Shortest Vector Problem (SVP) in p norm within a constant ...
Subhash Khot