Repetitions and permutations of columns in the semijoin algebra

Author: Leinders Dirk   Van Den Bussche Jan  

Publisher: Edp Sciences

E-ISSN: 1290-385x|43|2|179-187

ISSN: 0988-3754

Source: RAIRO - Theoretical Informatics and Applications, Vol.43, Iss.2, 2008-06, pp. : 179-187

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Abstract