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ICDT
1999
ACM
133views Database» more  ICDT 1999»
15 years 7 months ago
A Framework for the Investigation of Aggregate Functions in Database Queries
Abstract. In this paper we present a new approach for studying aggregations in the context of database query languages. Starting from a broad de nition of aggregate function, we ad...
Luca Cabibbo, Riccardo Torlone
CCA
2005
Springer
15 years 8 months ago
Effectively Open Real Functions
A function f is continuous iff the pre-image f −1[V ] of any open setV is open again. Dual to this topological7 property, f is called open iff the image f [U] of any open set U ...
Martin Ziegler
125
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APLAS
2004
ACM
15 years 8 months ago
A Functional Language for Logarithmic Space
Abstract. More than being just a tool for expressing algorithms, a welldesigned programming language allows the user to express her ideas efficiently. The design choices however e...
Peter Møller Neergaard
STACS
2010
Springer
15 years 10 months ago
Evolving Multialgebras Unify All Usual Sequential Computation Models
Abstract. It is well-known that Abstract State Machines (ASMs) can simulate “stepby-step” any type of machines (Turing machines, RAMs, etc.). We aim to overcome two facts: 1) s...
Serge Grigorieff, Pierre Valarcher
CSR
2007
Springer
15 years 9 months ago
Proving Church's Thesis
t) Yuri Gurevich Microsoft Research The talk reflects recent joint work with Nachum Dershowitz [4]. In 1936, Church suggested that the recursive functions, which had been defined...
Yuri Gurevich