Conference paper
Quasi-inverses of schema mappings
Ronald Fagin, Phokion G. Kolaitis, et al.
SIGMOD/PODS/ 2007
An elementary proof is presented of an asymptotic estimate for the number (up to isomorphism) of finite relational structures, under a quite general definition of "relational structure". © 1977.
Ronald Fagin, Phokion G. Kolaitis, et al.
SIGMOD/PODS/ 2007
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Logical Methods in Computer Science
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ACM Transactions on Database Systems (TODS)
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Journal of the ACM