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%ما هو (من)٪ 1 - تعريف
CLASS OF COMBINATORIAL ENUMERATION PROBLEMS
Graphical enumeration; Enumeration of graphs
![free trees]] on 2, 3, and 4 labeled vertices: <math>2^{2-2}=1</math> tree with 2 vertices,
<math>3^{3-2}=3</math> trees with 3 vertices, and <math>4^{4-2}=16</math> trees with 4 vertices.](https://commons.wikimedia.org/wiki/Special:FilePath/Cayley's formula 2-4.svg?width=200 "free trees]] on 2, 3, and 4 labeled vertices: <math>2^{2-2}=1</math> tree with 2 vertices,
<math>3^{3-2}=3</math> trees with 3 vertices, and <math>4^{4-2}=16</math> trees with 4 vertices.")
enumerated type
DATA TYPE CONSISTING OF AN UNORDERED SET OF NAMED VALUES
Enumeration (programming); Enum (Computer Science); Enum (computer science); Enumerated types; Enumerated data type; Enums; Comparison of programming languages (enumerated types); Enum class; Enum struct
<programming> (Or "enumeration") A type which includes in
its definition an exhaustive list of possible values for
variables of that type. Common examples include Boolean,
which takes values from the list [true, false ], and
day-of-week which takes values [Sunday, Monday, Tuesday,
Wednesday, Thursday, Friday, Saturday ]. Enumerated types are
a feature of strongly typed languages, including C and
Ada.
Characters, (fixed-size) integers and even floating-point
types could be (but are not usually) considered to be (large)
enumerated types.
(1996-11-28)
Enumerated type
DATA TYPE CONSISTING OF AN UNORDERED SET OF NAMED VALUES
Enumeration (programming); Enum (Computer Science); Enum (computer science); Enumerated types; Enumerated data type; Enums; Comparison of programming languages (enumerated types); Enum class; Enum struct
In computer programming, an enumerated type (also called enumeration, enum, or factor in the R programming language, and a categorical variable in statistics) is a data type consisting of a set of named values called elements, members, enumeral, or enumerators of the type. The enumerator names are usually identifiers that behave as constants in the language.
Graph enumeration
In combinatorics, an area of mathematics, graph enumeration describes a class of combinatorial enumeration problems in which one must count undirected or directed graphs of certain types, typically as a function of the number of vertices of the graph. These problems may be solved either exactly (as an algebraic enumeration problem) or asymptotically.
ويكيبيديا
Graph enumeration
In combinatorics, an area of mathematics, graph enumeration describes a class of combinatorial enumeration problems in which one must count undirected or directed graphs of certain types, typically as a function of the number of vertices of the graph. These problems may be solved either exactly (as an algebraic enumeration problem) or asymptotically. The pioneers in this area of mathematics were George Pólya, Arthur Cayley and J. Howard Redfield.
