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  2. Arc length - Wikipedia

    en.wikipedia.org/wiki/Arc_length

    As an example of his method, he determined the arc length of a semicubical parabola, which required finding the area under a parabola. [9] In 1660, Fermat published a more general theory containing the same result in his De linearum curvarum cum lineis rectis comparatione dissertatio geometrica (Geometric dissertation on curved lines in ...

  3. Hardy–Ramanujan–Littlewood circle method - Wikipedia

    en.wikipedia.org/wiki/Hardy–Ramanujan...

    The integral I n is divided up into integrals each on some arc of the circle that is adjacent to ζ, of length a function of s (again, at our discretion). The arcs make up the whole circle; the sum of the integrals over the major arcs is to make up 2 πiF ( n ) (realistically, this will happen up to a manageable remainder term).

  4. Lemniscate elliptic functions - Wikipedia

    en.wikipedia.org/wiki/Lemniscate_elliptic_functions

    The trigonometric sine and cosine analogously relate the arc length of an arc of a unit-diameter circle to the distance of one endpoint from the origin. L {\displaystyle {\mathcal {L}}} , the lemniscate of Bernoulli with unit distance from its center to its furthest point (i.e. with unit "half-width"), is essential in the theory of the ...

  5. Elliptic integral - Wikipedia

    en.wikipedia.org/wiki/Elliptic_integral

    The incomplete elliptic integral of the first kind F is defined as (,) = = (⁡;) = ⁡.This is Legendre's trigonometric form of the elliptic integral; substituting t = sin θ and x = sin φ, one obtains Jacobi's algebraic form:

  6. Staircase paradox - Wikipedia

    en.wikipedia.org/wiki/Staircase_paradox

    In mathematical analysis, the staircase paradox is a pathological example showing that limits of curves do not necessarily preserve their length. [1] It consists of a sequence of "staircase" polygonal chains in a unit square , formed from horizontal and vertical line segments of decreasing length, so that these staircases converge uniformly to ...

  7. Earth section paths - Wikipedia

    en.wikipedia.org/wiki/Earth_section_paths

    The inverse of the central angle arc length series above may be found on page 8a of Rapp, Vol. 1, [2] who credits Ganshin. [3] An alternative to using the inverse series is using Newton's method of successive approximations to θ 12 {\displaystyle \theta _{12}} .

  8. Goat grazing problem - Wikipedia

    en.wikipedia.org/wiki/Goat_grazing_problem

    The arc length of an involute is given by so the arc length |FG| of the involute in the fourth quadrant is []. Let c be the length of an arc segment of the involute between the y -axis and a vertical line tangent to the silo at θ = 3 π /2; it is the arc subtended by Φ .

  9. Introduction to the mathematics of general relativity - Wikipedia

    en.wikipedia.org/wiki/Introduction_to_the...

    The circle itself is characterized by coordinates y 1 and y 2 in the two-dimensional space. The circle itself is one-dimensional and can be characterized by its arc length x. The coordinate y is related to the coordinate x through the relation y 1 = r cos ⁠ x / r ⁠ and y 2 = r sin ⁠ x / r ⁠.