4961 search results - page 858 / 993 » Homomorphism-Homogeneous Relational Structures |
212
click to vote
SSD
1993
Springer
15 years 10 months ago
1993
Springer
: Spatial data types or algebras for database systems should (i) be fully general (which means, closed under set operations, hence e.g. a region value can be a set of polygons with...
151
click to vote
VLDB
1994
ACM
15 years 10 months ago
1994
ACM
The performance of data-parallel algorithms for spatial operations using data-parallel variants of the bucket PMR quadtree, R-tree, and R+-tree spatial data structures is compared...
164
click to vote
ICALP
1990
Springer
15 years 10 months ago
1990
Springer
Any tree can be represented in a max/ma//y compact form as a directed acyclic graph where common subtrees are factored and shared, being represented only once. Such a compaction ca...
199
click to vote
PODC
1990
ACM
15 years 10 months ago
1990
ACM
Abstract. We introduce a novel extension of propositional modal logic that is interpreted over Kripke structures in which a value is associated with every possible world. These val...
228
click to vote
AGTIVE
2007
Springer
15 years 10 months ago
2007
Springer
Meta-modeling is well known to define the basic concepts of domain-specific languages in an object-oriented way. Based on graph transformation, an abstract meta-model may be enhanc...