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» Two Normal Forms for Rewriting P Systems
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TACS
1994
Springer
13 years 11 months ago
Syntactic Definitions of Undefined: On Defining the Undefined
In the A-calculus, there is a standard notion of what terms should be considered to be "undefined": the unsolvable terms. There are various equivalent characterisations o...
Zena M. Ariola, Richard Kennaway, Jan Willem Klop,...
LPNMR
2009
Springer
13 years 12 months ago
Manifold Answer-Set Programs for Meta-reasoning
Abstract. In answer-set programming (ASP), the main focus usually is on computing answer sets which correspond to solutions to the problem represented by a logic program. Simple re...
Wolfgang Faber, Stefan Woltran
SIAMMAX
2010
146views more  SIAMMAX 2010»
13 years 2 months ago
A Comparison of Two-Level Preconditioners Based on Multigrid and Deflation
It is well-known that two-level and multi-level preconditioned conjugate gradient (PCG) methods provide efficient techniques for solving large and sparse linear systems whose coeff...
J. M. Tang, S. P. MacLachlan, Reinhard Nabben, C. ...
EDBT
2012
ACM
228views Database» more  EDBT 2012»
11 years 9 months ago
Towards scalable data integration under constraints
In this paper we consider the problem of answering queries using views, with or without ontological constraints, which is important for data integration, query optimization, and d...
George Konstantinidis, José Luis Ambite
AMC
2005
150views more  AMC 2005»
13 years 7 months ago
High order fitted operator numerical method for self-adjoint singular perturbation problems
We consider self-adjoint singularly perturbed two-point boundary value problems in conservation form. Highest possible order of uniform convergence for such problems achieved hith...
Kailash C. Patidar