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  2. Factorial - Wikipedia

    en.wikipedia.org/wiki/Factorial

    Download QR code; Print/export ... It is also included in scientific programming libraries such as the Python ... For example, the exponential factorial of 4 is ...

  3. Recursion - Wikipedia

    en.wikipedia.org/wiki/Recursion

    A classic example of recursion is the definition of the factorial function, given here in Python code: def factorial ( n ): if n > 0 : return n * factorial ( n - 1 ) else : return 1 The function calls itself recursively on a smaller version of the input (n - 1) and multiplies the result of the recursive call by n , until reaching the base case ...

  4. Factorial number system - Wikipedia

    en.wikipedia.org/wiki/Factorial_number_system

    The factorial number system is sometimes defined with the 0! place omitted because it is always zero (sequence A007623 in the OEIS). In this article, a factorial number representation will be flagged by a subscript "!". In addition, some examples will have digits delimited by a colon. For example, 3:4:1:0:1:0! stands for

  5. Kempner function - Wikipedia

    en.wikipedia.org/wiki/Kempner_function

    In number theory, the Kempner function [1] is defined for a given positive integer to be the smallest number such that divides the factorial!. For example, the number 8 {\displaystyle 8} does not divide 1 ! {\displaystyle 1!} , 2 ! {\displaystyle 2!} , or 3 ! {\displaystyle 3!} , but does divide 4 ! {\displaystyle 4!} , so S ( 8 ) = 4 ...

  6. Unary operation - Wikipedia

    en.wikipedia.org/wiki/Unary_operation

    Common notations are prefix notation (e.g. ¬, −), postfix notation (e.g. factorial n!), functional notation (e.g. sin x or sin(x)), and superscripts (e.g. transpose A T). Other notations exist as well, for example, in the case of the square root, a horizontal bar extending the square root sign over the argument can indicate the extent of the ...

  7. Factorion - Wikipedia

    en.wikipedia.org/wiki/Factorion

    Let be a natural number. For a base >, we define the sum of the factorials of the digits [5] [6] of , :, to be the following: ⁡ = =!. where = ⌊ ⁡ ⌋ + is the number of digits in the number in base , ! is the factorial of and

  8. Turing (programming language) - Wikipedia

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

    Here is a complete program defining and using the traditional recursive function to calculate a factorial. *comment*% Accepts a number and calculates its factorial function factorial (n: int) : real if n = 0 then result 1 else result n * factorial (n - 1) end if end factorial var n: int loop put "Please input an integer: "..

  9. Multiple factor analysis - Wikipedia

    en.wikipedia.org/wiki/Multiple_factor_analysis

    The core of MFA is a weighted factorial analysis: MFA firstly provides the classical results of the factorial analyses. 1. Representations of individuals in which two individuals are close to each other if they exhibit similar values for many variables in the different variable groups; in practice the user particularly studies the first ...