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» Extending the Relational Algebra to Capture Complex Objects
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VLDB
1989
ACM
114views Database» more  VLDB 1989»
13 years 8 months ago
Extending the Relational Algebra to Capture Complex Objects
An important direction in database research for non-standard applications (e.g. engineering or design applications) deals with adequate support for complex objects. Without doubt,...
Bernhard Mitschang
CJ
2010
114views more  CJ 2010»
13 years 4 months ago
Using the Relational Model to Capture Topological Information of Spaces
Abstract. Motivated by research on how topology may be a helpful foundation for building information modeling (BIM), a relational database version of the notions of chain complex a...
Patrick Erik Bradley, Norbert Paul
MFDBS
1991
125views Database» more  MFDBS 1991»
13 years 8 months ago
A Relational Algebra for Complex Objects Based on Partial Information
We study an approach to relational databases which treats relations not as subsets of a Cartesian product but as subsets of some domain { a partially ordered space of descriptions...
Leonid Libkin
ICDE
1994
IEEE
103views Database» more  ICDE 1994»
13 years 8 months ago
A Multi-Set Extended Relational Algebra - A Formal Approach to a Practical Issue
The relational data model is based on sets of tuples, i.e. it does not allow duplicate tuples in a relation. Many database languages and systems do require multi-set place, the hi...
Paul W. P. J. Grefen, Rolf A. de By
CORR
2007
Springer
113views Education» more  CORR 2007»
13 years 4 months ago
Geometry and the complexity of matrix multiplication
We survey results in algebraic complexity theory, focusing on matrix multiplication. Our goals are (i.) to show how open questions in algebraic complexity theory are naturally pose...
J. M. Landsberg