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  2. Stirling's approximation - Wikipedia

    en.wikipedia.org/wiki/Stirling's_approximation

    An alternative version uses the fact that the Poisson distribution converges to a normal distribution by the Central Limit Theorem. [5]Since the Poisson distribution with parameter converges to a normal distribution with mean and variance , their density functions will be approximately the same:

  3. Factorial - Wikipedia

    en.wikipedia.org/wiki/Factorial

    The factorial function is a common feature in scientific calculators. [73] It is also included in scientific programming libraries such as the Python mathematical functions module [74] and the Boost C++ library. [75]

  4. Central composite design - Wikipedia

    en.wikipedia.org/wiki/Central_composite_design

    A factorial (perhaps fractional) design in the factors studied, each having two levels; A set of center points, experimental runs whose values of each factor are the medians of the values used in the factorial portion. This point is often replicated in order to improve the precision of the experiment;

  5. Factorial experiment - Wikipedia

    en.wikipedia.org/wiki/Factorial_experiment

    Designed experiments with full factorial design (left), response surface with second-degree polynomial (right) In statistics, a full factorial experiment is an experiment whose design consists of two or more factors, each with discrete possible values or "levels", and whose experimental units take on all possible combinations of these levels across all such factors.

  6. Iterator - Wikipedia

    en.wikipedia.org/wiki/Iterator

    There are subtle differences and distinctions in the use of the terms "generator" and "iterator", which vary between authors and languages. [5] In Python, a generator is an iterator constructor: a function that returns an iterator. An example of a Python generator returning an iterator for the Fibonacci numbers using Python's yield statement ...

  7. Iterative method - Wikipedia

    en.wikipedia.org/wiki/Iterative_method

    In computational mathematics, an iterative method is a mathematical procedure that uses an initial value to generate a sequence of improving approximate solutions for a class of problems, in which the i-th approximation (called an "iterate") is derived from the previous ones.

  8. Iterated function - Wikipedia

    en.wikipedia.org/wiki/Iterated_function

    One of several methods of finding a series formula for fractional iteration, making use of a fixed point, is as follows. [15] First determine a fixed point for the function such that f(a) = a. Define f n (a) = a for all n belonging to the reals. This, in some ways, is the most natural extra condition to place upon the fractional iterates.

  9. Iteration - Wikipedia

    en.wikipedia.org/wiki/Iteration

    In mathematics, iteration may refer to the process of iterating a function, i.e. applying a function repeatedly, using the output from one iteration as the input to the next. Iteration of apparently simple functions can produce complex behaviors and difficult problems – for examples, see the Collatz conjecture and juggler sequences.