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ICTIR
2009
Springer
14 years 1 months ago
PageRank: Splitting Homogeneous Singular Linear Systems of Index One
Abstract. The PageRank algorithm is used today within web information retrieval to provide a content-neutral ranking metric over web pages. It employs power method iterations to so...
Douglas V. de Jager, Jeremy T. Bradley
TLCA
2009
Springer
14 years 1 months ago
Parametricity for Haskell with Imprecise Error Semantics
Types play an important role both in reasoning about Haskell and for its implementation. For example, the Glasgow Haskell Compiler performs certain fusion transformations that are...
Florian Stenger, Janis Voigtländer
LICS
2008
IEEE
14 years 1 months ago
Reachability Games and Game Semantics: Comparing Nondeterministic Programs
We investigate the notions of may- and mustapproximation in Erratic Idealized Algol (a nondeterministic extension of Idealized Algol), and give explicit characterizations of both ...
Andrzej S. Murawski
ICALP
2007
Springer
14 years 1 months ago
Universal Algebra and Hardness Results for Constraint Satisfaction Problems
We present algebraic conditions on constraint languages Γ that ensure the hardness of the constraint satisfaction problem CSP(Γ) for complexity classes L, NL, P, NP and ModpL. Th...
Benoit Larose, Pascal Tesson
RTA
2005
Springer
14 years 26 days ago
The Algebra of Equality Proofs
Proofs of equalities may be built from assumptions using proof rules for reflexivity, symmetry, and transitivity. Reflexivity is an axiom proving x=x for any x; symmetry is a 1-p...
Aaron Stump, Li-Yang Tan