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  2. Indicator function - Wikipedia

    en.wikipedia.org/wiki/Indicator_function

    In classical mathematics, characteristic functions of sets only take values 1 (members) or 0 (non-members). In fuzzy set theory, characteristic functions are generalized to take value in the real unit interval [0, 1], or more generally, in some algebra or structure (usually required to be at least a poset or lattice).

  3. MATLAB - Wikipedia

    en.wikipedia.org/wiki/MATLAB

    MATLAB (an abbreviation of "MATrix LABoratory" [18]) is a proprietary multi-paradigm programming language and numeric computing environment developed by MathWorks.MATLAB allows matrix manipulations, plotting of functions and data, implementation of algorithms, creation of user interfaces, and interfacing with programs written in other languages.

  4. Character theory - Wikipedia

    en.wikipedia.org/wiki/Character_theory

    Characters are class functions, that is, they each take a constant value on a given conjugacy class. More precisely, the set of irreducible characters of a given group G into a field F form a basis of the F-vector space of all class functions G → F. Isomorphic representations have the same characters.

  5. Array programming - Wikipedia

    en.wikipedia.org/wiki/Array_programming

    The cross product operation is an example of a vector rank function because it operates on vectors, not scalars. Matrix multiplication is an example of a 2-rank function, because it operates on 2-dimensional objects (matrices). Collapse operators reduce the dimensionality of an input data array by one or more dimensions. For example, summing ...

  6. APL (programming language) - Wikipedia

    en.wikipedia.org/wiki/APL_(programming_language)

    Like Hellerman's PAT system earlier, this implementation omitted the APL character set, but used special English reserved words for functions and operators. The system was later adapted for a time-sharing system and, by November 1966, it had been reprogrammed for the IBM System/360 Model 50 computer running in a time-sharing mode and was used ...

  7. Enumerated type - Wikipedia

    en.wikipedia.org/wiki/Enumerated_type

    In C, enumerations assign related names to a set of integer values. In Swift, enumerations are much more flexible and need not provide a value for each case of the enumeration. If a value (termed a raw value) is provided for each enumeration case, the value can be a string, a character, or a value of any integer or floating-point type.

  8. Class function - Wikipedia

    en.wikipedia.org/wiki/Class_function

    The character of a linear representation of G over a field K is always a class function with values in K. The class functions form the center of the group ring K [ G ]. Here a class function f is identified with the element ∑ g ∈ G f ( g ) g {\displaystyle \sum _{g\in G}f(g)g} .

  9. Set-valued function - Wikipedia

    en.wikipedia.org/wiki/Set-valued_function

    A set-valued function, also called a correspondence or set-valued relation, is a mathematical function that maps elements from one set, the domain of the function, to subsets of another set. [1] [2] Set-valued functions are used in a variety of mathematical fields, including optimization, control theory and game theory. Set-valued functions are ...