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EJC
2006
15 years 6 months ago
Invariant subspaces, duality, and covers of the Petersen graph
A general method for finding elementary abelian regular covering projections of finite connected graphs is applied to the Petersen graph. As a result, a complete list of pairwise ...
Aleksander Malnic, Primoz Potocnik
CSDA
2007
82views more  CSDA 2007»
15 years 6 months ago
Non-parametric log-concave mixtures
Finite mixtures of parametric distributions are often used to model data of which it is known or suspected that there are subpopulations. Instead of a parametric model, a penalize...
Paul H. C. Eilers, M. W. Borgdorff
CAI
2007
Springer
15 years 10 months ago
Bifinite Chu Spaces
This paper studies colimits of sequences of finite Chu spaces and their ramifications. We consider three base categories of Chu spaces: the generic Chu spaces (C), the extensional ...
Manfred Droste, Guo-Qiang Zhang
CSL
2009
Springer
15 years 10 months ago
Fixed-Point Definability and Polynomial Time
My talk will be a survey of recent results about the quest for a logic capturing polynomial time. In a fundamental study of database query languages, Chandra and Harel [4] first ra...
Martin Grohe
PODS
2010
ACM
223views Database» more  PODS 2010»
15 years 8 months ago
Characterizing schema mappings via data examples
Schema mappings are high-level specifications that describe the relationship between two database schemas; they are considered to be the essential building blocks in data exchange...
Bogdan Alexe, Phokion G. Kolaitis, Wang Chiew Tan