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  2. Subsequence - Wikipedia

    en.wikipedia.org/wiki/Subsequence

    For example, the sequence ,, is a subsequence of ,,,,, obtained after removal of elements ,, and . The relation of one sequence being the subsequence of another is a partial order . Subsequences can contain consecutive elements which were not consecutive in the original sequence.

  3. Series (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Series_(mathematics)

    Fourier (1807) set for himself a different problem, to expand a given function of ⁠ ⁠ in terms of the sines or cosines of multiples of ⁠ ⁠, a problem which he embodied in his Théorie analytique de la chaleur (1822). Euler had already given the formulas for determining the coefficients in the series; Fourier was the first to assert and ...

  4. Calculus of variations - Wikipedia

    en.wikipedia.org/wiki/Calculus_of_Variations

    Functions that maximize or minimize functionals may be found using the Euler–Lagrange equation of the calculus of variations. A simple example of such a problem is to find the curve of shortest length connecting two points. If there are no constraints, the solution is a straight line between the points. However, if the curve is constrained to ...

  5. Real analysis - Wikipedia

    en.wikipedia.org/wiki/Real_analysis

    Integration is a formalization of the problem of finding the area bound by a curve and the related problems of determining the length of a curve or volume enclosed by a surface. The basic strategy to solving problems of this type was known to the ancient Greeks and Chinese, and was known as the method of exhaustion. Generally speaking, the ...

  6. Calculus - Wikipedia

    en.wikipedia.org/wiki/Calculus

    Calculus is also used to find approximate solutions to equations; in practice, it is the standard way to solve differential equations and do root finding in most applications. Examples are methods such as Newton's method, fixed point iteration, and linear approximation.

  7. Longest increasing subsequence - Wikipedia

    en.wikipedia.org/wiki/Longest_increasing_subsequence

    This subsequence has length six; the input sequence has no seven-member increasing subsequences. The longest increasing subsequence in this example is not the only solution: for instance, 0, 4, 6, 9, 11, 15 0, 2, 6, 9, 13, 15 0, 4, 6, 9, 13, 15. are other increasing subsequences of equal length in the same input sequence.

  8. Nonstandard calculus - Wikipedia

    en.wikipedia.org/wiki/Nonstandard_calculus

    Example 2: a function f is uniformly continuous on the semi-open interval [0,∞) if and only if it is continuous at the standard points of the interval, and in addition, the natural extension f* is microcontinuous at every positive infinite hyperreal point. Example 3: similarly, the failure of uniform continuity for the squaring function

  9. Beltrami identity - Wikipedia

    en.wikipedia.org/wiki/Beltrami_identity

    The solution to the brachistochrone problem is the cycloid. An example of an application of the Beltrami identity is the brachistochrone problem , which involves finding the curve y = y ( x ) {\displaystyle y=y(x)} that minimizes the integral

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