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- этимология
Что (кто) такое disjunctive normal form - определение
CONCEPT IN BOOLEAN LOGIC
Sum-of-product; Disjunct normal form; Disjunctive Normal Form; Full disjunctive normal form; Sum-of-products expression; Disjunctive normal formula
Disjunctive Normal Form
(DNF) A logical formula consisting of a disjunction of
conjunctions where no conjunction contains a disjunction.
E.g. the DNF of (A or B) and C is (A and C) or (B and C).
(1994-12-07)
Third normal form
NORMALIZING A DATABASE DESIGN TO REDUCE THE DUPLICATION OF DATA AND ENSURE REFERENTIAL INTEGRITY
3NF; Third Normal Form; 3rd normal form
Third normal form (3NF) is a database schema design approach for relational databases which uses normalizing principles to reduce the duplication of data, avoid data anomalies, ensure referential integrity, and simplify data management. It was defined in 1971 by Edgar F.
3NF
NORMALIZING A DATABASE DESIGN TO REDUCE THE DUPLICATION OF DATA AND ENSURE REFERENTIAL INTEGRITY
3NF; Third Normal Form; 3rd normal form
Википедия
Disjunctive normal form
In boolean logic, a disjunctive normal form (DNF) is a canonical normal form of a logical formula consisting of a disjunction of conjunctions; it can also be described as an OR of ANDs, a sum of products, or (in philosophical logic) a cluster concept. As a normal form, it is useful in automated theorem proving.
