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  2. Geometric progression - Wikipedia

    en.wikipedia.org/wiki/Geometric_progression

    The first block is a unit block and the dashed line represents the infinite sum of the sequence, a number that it will forever approach but never touch: 2, 3/2, and 4/3 respectively. A geometric progression, also known as a geometric sequence, is a mathematical sequence of non-zero numbers where each term after the first is found by multiplying ...

  3. Arithmetico-geometric sequence - Wikipedia

    en.wikipedia.org/wiki/Arithmetico-geometric_sequence

    In mathematics, an arithmetico-geometric sequence is the result of term-by-term multiplication of a geometric progression with the corresponding terms of an arithmetic progression. The nth term of an arithmetico-geometric sequence is the product of the nth term of an arithmetic sequence and the nth term of a geometric sequence. [1]

  4. Geometric series - Wikipedia

    en.wikipedia.org/wiki/Geometric_series

    The terms of a geometric series are also the elements of a generalized Fibonacci sequence (a recursively defined sequence with F n = F n-1 + F n-2) when the series's common ratio r satisfies the constraint 1 + r = r 2, which is when r equals the golden ratio or its conjugate (i.e., r = (1 ± √5)/2).

  5. Collatz conjecture - Wikipedia

    en.wikipedia.org/wiki/Collatz_conjecture

    If one considers only the odd numbers in the sequence generated by the Collatz process, then each odd number is on average ⁠ 3 / 4 ⁠ of the previous one. [16] (More precisely, the geometric mean of the ratios of outcomes is ⁠ 3 / 4 ⁠.) This yields a heuristic argument that every Hailstone sequence should decrease in the long run ...

  6. Bézier curve - Wikipedia

    en.wikipedia.org/wiki/Bézier_curve

    A Bézier curve is defined by a set of control points P0 through Pn, where n is called the order of the curve (n = 1 for linear, 2 for quadratic, 3 for cubic, etc.). The first and last control points are always the endpoints of the curve; however, the intermediate control points generally do not lie on the curve.

  7. Möbius transformation - Wikipedia

    en.wikipedia.org/wiki/Möbius_transformation

    The existence of the inverse Möbius transformation and its explicit formula are easily derived by the composition of the inverse functions of the simpler transformations. That is, define functions g 1 , g 2 , g 3 , g 4 such that each g i is the inverse of f i .

  8. Geometric distribution - Wikipedia

    en.wikipedia.org/wiki/Geometric_distribution

    The geometric distribution is the discrete probability distribution that describes when the first success in an infinite sequence of independent and identically distributed Bernoulli trials occurs. Its probability mass function depends on its parameterization and support.

  9. Eulerian number - Wikipedia

    en.wikipedia.org/wiki/Eulerian_number

    In combinatorics, the Eulerian number is the number of permutations of the numbers 1 to in which exactly elements are greater than the previous element (permutations with "ascents"). Leonhard Euler investigated them and associated polynomials in his 1755 book Institutiones calculi differentialis. The polynomials presently known as Eulerian ...