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APAL
2005
82views more  APAL 2005»
13 years 7 months ago
A descending chain condition for groups definable in o-minimal structures
We prove that if G is a group definable in a saturated o-minimal structure, then G has no infinite descending chain of type-definable subgroups of bounded index. Equivalently, G h...
Alessandro Berarducci, Margarita Otero, Ya'acov Pe...
LOPSTR
2009
Springer
14 years 2 months ago
LP with Flexible Grouping and Aggregates Using Modes
We propose a new grouping operator for logic programs based on the group_by operator of SQL. The novelty of our proposal lies in the use of modes, which allows us to relax some rat...
Marcin Czenko, Sandro Etalle
FOCM
2007
54views more  FOCM 2007»
13 years 7 months ago
Smooth and Algebraic Invariants of a Group Action: Local and Global Constructions
We provide an algebraic formulation of the moving frame method for constructing local smooth invariants on a manifold under an action of a Lie group. This formulation gives rise t...
Evelyne Hubert, Irina A. Kogan
WIKIS
2010
ACM
13 years 11 months ago
Project management in the Wikipedia community
A feature of online communities and notably Wikipedia is the increasing use of managerial techniques to coordinate the efforts of volunteers. In this short paper, we explore the ...
Hang Ung, Jean-Michel Dalle
HYBRID
2007
Springer
14 years 1 months ago
Groupoids in Control Systems and the Reachability Problem for a Class of Quantized Control Systems with Nonabelian Symmetries
The aim of this paper is twofold. On one hand we present an approach to the general problem of nonlinear control in the framework of (differentiable) groupoids, which, in our opin...
Alessandro Arsie, Emilio Frazzoli