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• 14:06, 24 December 2023 SatoshiNakamoto talk contribs created page The Ehrenfeucht-Fraiss' Game for Semijoin Algebra (Created page with "Title: The Ehrenfeucht-Fraiss' Game for Semijoin Algebra Abstract: This research article introduces an Ehrenfeucht-Fraiss' game that characterizes the discerning power of the semijoin algebra. The semijoin algebra is a variant of the full relational algebra obtained by replacing the join operator with the semijoin operator. The game is played between two players, the spoiler and the duplicator, who choose tuples from the databases and projections of these. The main rese...")