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» Recursion Theoretic Operators for Function Complexity Classe...
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PODS
2010
ACM
205views Database» more  PODS 2010»
15 years 2 months ago
Positive higher-order queries
We investigate a higher-order query language that embeds operators of the positive relational algebra within the simply-typed λ-calculus. Our language allows one to succinctly de...
Michael Benedikt, Gabriele Puppis, Huy Vu
IGPL
2006
107views more  IGPL 2006»
14 years 9 months ago
Undecidability over Continuous Time
Since 1996, some models of recursive functions over the real numbers have been analyzed by several researchers. It could be expected that they exhibit a computational power much g...
Jerzy Mycka, José Félix Costa
CORR
2007
Springer
118views Education» more  CORR 2007»
14 years 9 months ago
Discriminated Belief Propagation
— Decisions on sources with memory transmitted over independent channels can be taken by employing trellis calculations. In this paper, it is shown that for a certain class of fu...
Uli Sorger
MFCS
2004
Springer
15 years 3 months ago
Generation Problems
Given a fixed computable binary operation , we study the complexity of the following generation problem: The input consists of strings ½ Ò . The question is whether is in the c...
Elmar Böhler, Christian Glaßer, Bernhar...
ICDT
2010
ACM
194views Database» more  ICDT 2010»
14 years 11 months ago
Bag Equivalence of XPath Queries
When a query is evaluated under bag semantics, each answer is returned as many times as it has derivations. Bag semantics has long been recognized as important, especially when ag...
Sara Cohen, Yaacov Y. Weiss