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  2. Radius of convergence - Wikipedia

    en.wikipedia.org/wiki/Radius_of_convergence

    Radius of convergence. In mathematics, the radius of convergence of a power series is the radius of the largest disk at the center of the series in which the series converges. It is either a non-negative real number or . When it is positive, the power series converges absolutely and uniformly on compact sets inside the open disk of radius equal ...

  3. Rate of convergence - Wikipedia

    en.wikipedia.org/wiki/Rate_of_convergence

    Convergence rate definitions. Suppose that the sequence converges to the number . The sequence is said to converge with order to and with a rate of convergence if. for some positive constant if and if . [2][4][5] If the sequence converges but then other more technical rate definitions are called for. [6] This definition is technically called Q ...

  4. Convergence tests - Wikipedia

    en.wikipedia.org/wiki/Convergence_tests

    In mathematics, convergence tests are methods of testing for the convergence, conditional convergence, absolute convergence, interval of convergence or divergence of an infinite series =. List of tests

  5. Root test - Wikipedia

    en.wikipedia.org/wiki/Root_test

    In mathematics, the root test is a criterion for the convergence (a convergence test) of an infinite series. It depends on the quantity. where are the terms of the series, and states that the series converges absolutely if this quantity is less than one, but diverges if it is greater than one. It is particularly useful in connection with power ...

  6. Trapezoidal rule - Wikipedia

    en.wikipedia.org/wiki/Trapezoidal_rule

    The trapezoidal rule is one of a family of formulas for numerical integration called Newton–Cotes formulas, of which the midpoint rule is similar to the trapezoid rule. Simpson's rule is another member of the same family, and in general has faster convergence than the trapezoidal rule for functions which are twice continuously differentiable ...

  7. Golden-section search - Wikipedia

    en.wikipedia.org/wiki/Golden-section_search

    Calculate an interior point and its functional value F 2. The two interval lengths are in the ratio c : r or r : c where r = φ − 1; and c = 1 − r, with φ being the golden ratio. Using the triplet, determine if convergence criteria are fulfilled. If they are, estimate the X at the minimum from that triplet and return.

  8. Ratio test - Wikipedia

    en.wikipedia.org/wiki/Ratio_test

    In mathematics, the ratio test is a test (or "criterion") for the convergence of a series. where each term is a real or complex number and an is nonzero when n is large. The test was first published by Jean le Rond d'Alembert and is sometimes known as d'Alembert's ratio test or as the Cauchy ratio test. [1]

  9. Riemann sum - Wikipedia

    en.wikipedia.org/wiki/Riemann_sum

    The interval [0, 2] is firstly divided into n subintervals, each of which is given a width of ; these are the widths of the Riemann rectangles (hereafter "boxes"). Because the right Riemann sum is to be used, the sequence of x coordinates for the boxes will be x 1 , x 2 , … , x n {\displaystyle x_{1},x_{2},\ldots ,x_{n}} .