- relationship cardinality
- мощность связи, мощность отношения
English-Russian electronics dictionary .
English-Russian electronics dictionary .
Cardinality (data modeling) — In data modeling, the cardinality of one data table with respect to another data table is a critical aspect of database design. Relationships between data tables define cardinality when explaining how each table links to another. In the… … Wikipedia
cardinality — noun a) Of a set, the number of elements it contains. The empty set has a cardinality of zero. b) The property of a relationship between a database table and another one, specifying whether it is one to one, one to many, many to one, or many to… … Wiktionary
Entity-relationship model — A sample Entity relationship diagram using Chen s notation In software engineering, an entity relationship model (ERM) is an abstract and conceptual representation of data. Entity relationship modeling is a database modeling method, used to… … Wikipedia
Set (mathematics) — This article gives an introduction to what mathematicians call intuitive or naive set theory; for a more detailed account see Naive set theory. For a rigorous modern axiomatic treatment of sets, see Set theory. The intersection of two sets is… … Wikipedia
Saturated model — There is an unrelated notion of saturated model in the context of structural equation modeling. In mathematical logic, and particularly in its subfield model theory, a saturated model M is one which realizes as many complete types as may be… … Wikipedia
Georg Cantor — Infobox Scientist name = Georg Ferdinand Ludwig Cantor image width=225px caption = birth date = birth date|1845|3|3 birth place = Saint Petersburg, Russia death date = death date and age|1918|1|6|1845|3|3 death place = Halle, Germany residence =… … Wikipedia
logic, history of — Introduction the history of the discipline from its origins among the ancient Greeks to the present time. Origins of logic in the West Precursors of ancient logic There was a medieval tradition according to which the Greek philosopher … Universalium
Description logic — (DL) is a family of formal knowledge representation languages. It is more expressive than propositional logic but has more efficient decision problems than first order predicate logic. DL is used in artificial intelligence for formal reasoning on … Wikipedia
Congruence lattice problem — In mathematics, the congruence lattice problem asks whether every algebraic distributive lattice is isomorphic to the congruence lattice of some other lattice. The problem was posed by Robert P. Dilworth, and for many years it was one of the most … Wikipedia
Data model — Overview of data modeling context: A data model provides the details of information to be stored, and is of primary use when the final product is the generation of computer software code for an application or the preparation of a functional… … Wikipedia
Recursion theory — Recursion theory, also called computability theory, is a branch of mathematical logic that originated in the 1930s with the study of computable functions and Turing degrees. The field has grown to include the study of generalized computability… … Wikipedia