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On Subalgebras of an Algebra of Predicates.
Dietlinde Lau
Published in:
J. Inf. Process. Cybern. (1985)
Keyphrases
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maximal tractable
relational algebra
spatial data types
data model
query language
real numbers
user defined
algebraic expressions
spatial data
real time
information systems
spatial databases
database
algebraic operations
algebraic geometry
distributive lattices
aggregate functions
datalog programs
horn clauses