• Thumbnail for Bessel function
    Bessel functions are mathematical special functions that commonly appear in problems involving wave motion, heat conduction, and other physical phenomena...
    76 KB (12,338 words) - 03:11, 8 August 2025
  • expresses any given function f(r) as the weighted sum of an infinite number of Bessel functions of the first kind Jν(kr). The Bessel functions in the sum are...
    26 KB (4,204 words) - 21:10, 3 February 2025
  • Thumbnail for Kaiser window
    known as the Kaiser–Bessel window, was developed by James Kaiser at Bell Laboratories. It is a one-parameter family of window functions used in finite impulse...
    8 KB (983 words) - 11:56, 8 April 2024
  • Thumbnail for Friedrich Wilhelm Bessel
    important mathematical functions were first studied systematically by Bessel and were named Bessel functions in his honour. Bessel was born in Minden, Westphalia...
    31 KB (2,983 words) - 19:56, 9 August 2025
  • called Bessel–Thomson filters in recognition of W. E. Thomson, who worked out how to apply Bessel functions to filter design in 1949. The Bessel filter...
    18 KB (2,911 words) - 00:23, 24 May 2025
  • Fourier–Bessel series is a particular kind of generalized Fourier series (an infinite series expansion on a finite interval) based on Bessel functions. Fourier–Bessel...
    8 KB (1,134 words) - 14:04, 6 August 2025
  • Thumbnail for Bessel beam
    A Bessel beam is a wave whose amplitude is described by a Bessel function of the first kind. Electromagnetic, acoustic, gravitational, and matter waves...
    19 KB (2,115 words) - 07:51, 16 July 2025
  • Thumbnail for Window function
    Kaiser window which is defined in terms of a modified Bessel function. This hybrid window function was introduced to decrease the peak side-lobe level of...
    74 KB (8,875 words) - 04:15, 25 June 2025
  • In mathematics, the Bessel–Maitland function, or Wright generalized Bessel function, is a generalization of the Bessel function, introduced by Edward...
    1 KB (172 words) - 15:56, 10 May 2025
  • Thumbnail for Bessel–Clifford function
    mathematical analysis, the Bessel–Clifford function, named after Friedrich Bessel and William Kingdon Clifford, is an entire function of two complex variables...
    7 KB (1,213 words) - 12:06, 12 June 2024
  • reverse Bessel polynomial is used in the design of Bessel electronic filters. The Bessel polynomial may also be defined using Bessel functions from which...
    14 KB (3,018 words) - 22:24, 11 July 2025
  • Γ {\displaystyle \Gamma } is the gamma function, K ν {\displaystyle K_{\nu }} is the modified Bessel function of the second kind, and ρ and ν {\displaystyle...
    7 KB (1,347 words) - 21:45, 20 April 2025
  • In mathematics, a Jackson q-Bessel function (or basic Bessel function) is one of the three q-analogs of the Bessel function introduced by Jackson (1906a...
    13 KB (2,730 words) - 20:35, 26 April 2025
  • Thumbnail for Sinc function
    (Rayleigh's formula) for the zeroth-order spherical Bessel function of the first kind. The sinc function has two forms, normalized and unnormalized. In mathematics...
    23 KB (3,296 words) - 04:48, 12 July 2025
  • Thumbnail for Green's function
    Heaviside step function, J ν ( z ) {\textstyle J_{\nu }(z)} is a Bessel function, I ν ( z ) {\textstyle I_{\nu }(z)} is a modified Bessel function of the first...
    43 KB (5,810 words) - 04:19, 21 July 2025
  • Dedekind eta function Airy function Bessel functions: Defined by a differential equation; useful in astronomy, electromagnetism, and mechanics. Bessel–Clifford...
    10 KB (1,065 words) - 21:42, 29 July 2025
  • Thumbnail for Frequency modulation
    carrier modulated by such a sinusoidal signal can be represented with Bessel functions; this provides the basis for a mathematical understanding of frequency...
    31 KB (4,016 words) - 19:19, 16 July 2025
  • Thumbnail for Generalized hypergeometric function
    in turn have many particular special functions as special cases, such as elementary functions, Bessel functions, and the classical orthogonal polynomials...
    39 KB (8,158 words) - 22:18, 31 July 2025
  • Bessel may refer to: Bessel beam Bessel ellipsoid Bessel function in mathematics Bessel's inequality in mathematics Bessel's correction in statistics Bessel...
    1 KB (179 words) - 07:30, 12 January 2025
  • Thumbnail for Point spread function
    uniform function over a circular area (in one FT domain) corresponds to J1(x)/x in the other FT domain, where J1(x) is the first-order Bessel function of the...
    24 KB (3,269 words) - 15:47, 8 May 2025
  • Thumbnail for Synchrotron function
    Second synchrotron function G ( x ) = x K 2 3 ( x ) {\displaystyle G(x)=xK_{\frac {2}{3}}(x)} where Kj is the modified Bessel function of the second kind...
    2 KB (244 words) - 04:20, 19 July 2025
  • The variance-gamma distribution, generalized Laplace distribution or Bessel function distribution is a continuous probability distribution that is defined...
    5 KB (481 words) - 10:58, 22 May 2025
  • identity represents the Lorentz factor in terms of an infinite series of Bessel functions: ∑ m = 1 ∞ ( J m − 1 2 ( m β ) + J m + 1 2 ( m β ) ) = 1 1 − β 2 ....
    13 KB (1,668 words) - 07:50, 23 July 2025
  • incomplete Bessel functions are types of special functions which act as a type of extension from the complete-type of Bessel functions. The incomplete Bessel functions...
    7 KB (2,611 words) - 12:18, 4 April 2024
  • Thumbnail for Laguerre polynomials
    the Bessel function J α ( x ) {\displaystyle J_{\alpha }(x)} . a m {\displaystyle a_{m}} is the m {\displaystyle m} -th zero of the Airy function Ai ⁡...
    46 KB (8,524 words) - 07:19, 28 July 2025
  • \operatorname {arctg} } , or tan − 1 {\displaystyle \tan ^{-1}} . The Bessel functions may be denoted J n ( x ) , {\displaystyle J_{n}(x),} besselj ⁡ ( n...
    14 KB (1,636 words) - 19:37, 24 June 2025
  • contains functions for calculating sine, cosine, arctangent, natural logarithm, the exponential function and the two parameter Bessel function J. Most...
    17 KB (1,757 words) - 23:57, 21 July 2025
  • mathematics, the Hahn–Exton q-Bessel function or the third Jackson q-Bessel function is a q-analog of the Bessel function, and satisfies the Hahn-Exton...
    6 KB (893 words) - 19:54, 11 August 2024
  • Thumbnail for Dirac delta function
    {1}{\varepsilon }}}^{\frac {1}{\varepsilon }}\cos(kx)\,dk} and the Bessel function η ε ( x ) = 1 ε J 1 ε ( x + 1 ε ) . {\displaystyle \eta _{\varepsilon...
    98 KB (14,493 words) - 06:48, 4 August 2025
  • Thumbnail for Wigner semicircle distribution
    confluent hypergeometric function and J1 is the Bessel function of the first kind. Likewise the moment generating function can be calculated as M ( t...
    8 KB (988 words) - 04:16, 7 July 2025