Inflationary datalog - PowerPoint PPT Presentation

Extensions of Datalog

Extensions of Datalog. Wednesday, February 13, 2001. Outline. Non-recursive Datalog with negation Datalog with negation Stratified Datalog  Inflationary Datalog  Partial Datalog  Query languages and complexity classes. [AHV] Chapters 14, 15, 17. Picture So Far. Recursive queries.

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Finite Model Theory Lecture 9

Finite Model Theory Lecture 9. Logics and Complexity Classes (cont’d). Outline. Proof of Immerman and Vardi’s theorems Normal form for lfp Datalog Other logics capturing complexity classes. Proof: LFP = PTIME. LFP + &lt; µ PTIME [why ?] To show PTIME µ LFP + &lt;

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441 views • 30 slides

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