Sciweavers

504 search results - page 28 / 101
» The Complexity of Symmetry-Breaking Formulas
Sort
View
DCG
2011
14 years 11 months ago
Random Geometric Complexes
We study the expected topological properties of ˇCech and Vietoris-Rips complexes built on random points in Rd . We find higher dimensional analogues of known results for connect...
Matthew Kahle
OTM
2005
Springer
15 years 9 months ago
Inferring Complex Semantic Mappings Between Relational Tables and Ontologies from Simple Correspondences
There are many problems requiring a semantic account of a database schema. At its best, such an account consists of mapping formulas between the schema and a formal conceptual mode...
Yuan An, Alexander Borgida, John Mylopoulos
DAGSTUHL
2004
15 years 5 months ago
On the Complexity of Parabolic Initial Value Problems with Variable Drift
We study the intrinsic difficulty of solving linear parabolic initial value problems numerically at a single point. We present a worst case analysis for deterministic as well as fo...
Knut Petras, Klaus Ritter
DAM
2006
136views more  DAM 2006»
15 years 4 months ago
The complexity of maximum matroid-greedoid intersection and weighted greedoid maximization,
The maximum intersection problem for a matroid and a greedoid, given by polynomialtime oracles, is shown NP-hard by expressing the satisfiability of boolean formulas in 3-conjunct...
Taneli Mielikäinen, Esko Ukkonen
TIT
2008
51views more  TIT 2008»
15 years 4 months ago
Spectral Relations for Multidimensional Complex Improper Stationary and (Almost) Cyclostationary Processes
Abstract--We study continuous-time multidimensional widesense stationary (WSS) and (almost) cyclostationary processes in the frequency domain. Under the assumption that the correla...
Patrik Wahlberg, Peter J. Schreier