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  2. Geometric progression - Wikipedia

    en.wikipedia.org/wiki/Geometric_progression

    Examples of a geometric sequence are powers r k of a fixed non-zero number r, such as 2 k and 3 k. The general form of a geometric sequence is , , , , , … where r is the common ratio and a is the initial value. The sum of a geometric progression's terms is called a geometric series.

  3. Geometric series - Wikipedia

    en.wikipedia.org/wiki/Geometric_series

    The geometric series is an infinite series derived from a special type of sequence called a geometric progression.This means that it is the sum of infinitely many terms of geometric progression: starting from the initial term , and the next one being the initial term multiplied by a constant number known as the common ratio .

  4. Riemann–Roch theorem for surfaces - Wikipedia

    en.wikipedia.org/wiki/Riemann–Roch_theorem_for...

    K) is a Chern number and the self-intersection number of the canonical class K, and e = c 2 is the topological Euler characteristic. It can be used to replace the term χ(0) in the Riemann–Roch theorem with topological terms; this gives the Hirzebruch–Riemann–Roch theorem for surfaces.

  5. Arithmetico-geometric sequence - Wikipedia

    en.wikipedia.org/wiki/Arithmetico-geometric_sequence

    In general, these series with =, =, =, and = give the expectations of "the number of trials until first success" in Bernoulli processes with "success probability" . The probabilities of each outcome follow a geometric distribution and provide the geometric sequence factors in the terms of the series, while the number of trials per outcome ...

  6. List of mathematical series - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_series

    2.3 Trigonometric, inverse trigonometric, hyperbolic, and inverse hyperbolic functions relationship 2.4 Modified-factorial denominators 2.5 Binomial coefficients

  7. List of formulas in Riemannian geometry - Wikipedia

    en.wikipedia.org/wiki/List_of_formulas_in...

    The variation formula computations above define the principal symbol of the mapping which sends a pseudo-Riemannian metric to its Riemann tensor, Ricci tensor, or scalar curvature.

  8. Algebraic K-theory - Wikipedia

    en.wikipedia.org/wiki/Algebraic_K-theory

    For non-Archimedean local fields, the group K 2 (F) is the direct sum of a finite cyclic group of order m, say, and a divisible group K 2 (F) m. [67] We have K 2 (Z) = Z/2, [68] and in general K 2 is finite for the ring of integers of a number field. [69] We further have K 2 (Z/n) = Z/2 if n is divisible by 4, and otherwise zero. [70]

  9. Binomial series - Wikipedia

    en.wikipedia.org/wiki/Binomial_series

    Differentiating term-wise the binomial series within the disk of convergence | x | < 1 and using formula , one has that the sum of the series is an analytic function solving the ordinary differential equation (1 + x)u′(x) − αu(x) = 0 with initial condition u(0) = 1. The unique solution of this problem is the function u(x) = (1 + x) α.