4397 search results - page 63 / 880 » Relational Algebra Operations |
LICS
2007
IEEE
14 years 2 months ago
2007
IEEE
A k-edge operation ϕ on a finite set A is a k + 1-ary operation that satisfies the identities ϕ(x, x, y, . . . , y) ≈ ϕ(x, y, x, y, . . . , y) ≈ y and ϕ(y, y, y, x, y, ....
JUCS
2000
13 years 7 months ago
2000
Abstract: A study of the classes of nite relations as enriched strict monoidal categories is presented in CaS91]. The relations there are interpreted as connections in owchart sche...
IJCAI
1993
13 years 9 months ago
1993
objects, like elements of (abstract) data types in ordinary programming languages In the theory of abstract data types most often one only considers algebraic structures where all ...
AAAI
1998
13 years 9 months ago
1998
Wedefine an algebra of ternary relations for cyclic ordering of 2Dorientations. Thealgebra (1) is a refinement of the CYCORDtheory; (2) contains 24 atomic relations, hence 224 gen...
SIGMOD
2007
ACM
14 years 7 months ago
2007
ACM
Incomplete information arises naturally in numerous data management applications. Recently, several researchers have studied query processing in the context of incomplete informat...