1537 search results - page 70 / 308 » On sets not belonging to algebras |
ICDT
2001
ACM
14 years 5 days ago
2001
ACM
Rewriting queries using views is a powerful technique that has applications in query optimization, data integration, data warehousing etc. Query rewriting in relational databases ...
IDEAS
2000
IEEE
14 years 4 days ago
2000
IEEE
We present SECONDO, a new generic environment supporting the implementation of database systems for a wide range of data models and query languages. On the one hand, this framewor...
JSYML
2008
13 years 7 months ago
2008
. We give a novel application of algebraic logic to first order logic. A new, flexible construction is presented for representable but not completely representable atomic relation ...
FOCM
2008
13 years 7 months ago
2008
For an ideal I R[x] given by a set of generators, a new semidefinite characterization of its real radical I(VR(I)) is presented, provided it is zero-dimensional (even if I is not...
IJCGA
2006
13 years 7 months ago
2006
We obtain lower bounds in the algebraic computation tree model for deciding the separability of two disjoint point sets. In particular, we show (n log n) time lower bounds for sep...