Indian Journal of Science and Technology
Year: 2020, Volume: 13, Issue: 25, Pages: 2509-2519
Trinh Dinh Thang1*, Tran Minh Tuyen2, Trinh Ngoc Truc1, Pham Thi Phuong1
1Hanoi Pedagogical University No2
2University Union, Vietnam
Email: [email protected]
Received Date:28 May 2020, Accepted Date:04 June 2020, Published Date:17 July 2020
Objectives: The article proposed a new type of dependency on blocks and slices. Then found and proved the properties of this new dependency. Method: Logical inference methods were used. Findings: A new type of data relationship has been proposed: Multivalued positive Boolean dependencies on block and slice in the database model of block form. From this new concept, the article stated and demonstrated the equivalence of the three types of deduction, namely: m-deduction by logic, m-deduction by block, m-deduction by block has no more than two elements. Next are the necessary and sufficient criteria of the tight m-expression for the set of multivalued positive Boolean dependencies on block and slice, the sufficient properties for a set of functions fI;^;_g. The properties related to this new concept when the block degenerated into relation. Novelty: The proposed new dependency with their properties on the block and on the slice are completely new.
Keywords: Multivalued positive Boolean dependencies; block; Boolean dependencies; block schemes
© 2020 Thang, Tuyen,Truc, Phuong.This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)
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