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» The Complexity of Symmetry-Breaking Formulas
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DCG
2011
13 years 4 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
14 years 3 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
13 years 11 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»
13 years 10 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»
13 years 9 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