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AMC
2006
80views more  AMC 2006»
15 years 4 months ago
Parallel preconditioned conjugate gradient optimization of the Rayleigh quotient for the solution of sparse eigenproblems
A parallel algorithm based on the multidimensional minimization of the Rayleigh quotient is proposed to evaluate the leftmost eigenpairs of the generalized symmetric positive defi...
Luca Bergamaschi, Angeles Martinez, Giorgio Pini
SIGACT
2008
103views more  SIGACT 2008»
15 years 4 months ago
Computational geometry column 50
Two long-open problems have been solved: (1) every sufficiently large planar point set in general position contains the vertices of an empty hexagon; (2) every finite collection o...
Joseph O'Rourke
FOSSACS
2003
Springer
15 years 9 months ago
Categories of Containers
We introduce the notion of containers as a mathematical formalisation of the idea that many important datatypes consist of templates where data is stored. We show that containers h...
Michael Abbott, Thorsten Altenkirch, Neil Ghani
NDJFL
2002
74views more  NDJFL 2002»
15 years 4 months ago
The Semantics of Entailment Omega
This paper discusses the relation between the minimal positive relevant logic B+ and intersection and union type theories. There is a marvellous coincidence between these very diff...
Mariangiola Dezani-Ciancaglini, Robert K. Meyer, Y...
HASKELL
2006
ACM
15 years 10 months ago
Polymorphic variants in Haskell
In languages that support polymorphic variants, a single variant value can be passed to many contexts that accept different sets of constructors. Polymorphic variants are potenti...
Koji Kagawa