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Explaining Wrong Queries Using Small Examples. [PDF]

open access: yesProc ACM SIGMOD Int Conf Manag Data, 2019
Miao Z, Roy S, Yang J.
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Generalized Hadamard matrices with a hole and projective planes of prime order (Research on algebraic combinatorics, related groups and algebras)

open access: yesGeneralized Hadamard matrices with a hole and projective planes of prime order (Research on algebraic combinatorics, related groups and algebras)
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RELATIVE PROJECTIVE COVERS AND THE BRAUER CONSTRUCTION OVER FINITE GROUP ALGEBRAS (Cohomology Theory of Finite Groups and Related Topics)

open access: yesRELATIVE PROJECTIVE COVERS AND THE BRAUER CONSTRUCTION OVER FINITE GROUP ALGEBRAS (Cohomology Theory of Finite Groups and Related Topics)
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Projective algebra and the calculus of relations

Journal of Symbolic Logic, 1978
In [1] there were given postulates for an abstract “projective algebra” which, in the words of the authors, represented a “modest beginning for a study of logic with quantifiers from a boolean point of view”. In [5], D. Monk observed that the study initiated in [1] was an initial step in the development of algebraic versions of logic from which have ...
Alexander R. Bednarek, Stanislaw M. Ulam
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Projection and join in relational algebras

Cybernetics and Systems Analysis, 1997
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Red'ko, V. N., Brona, Yu. I., Bui, D. B.
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