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  2. Bessel function - Wikipedia

    en.wikipedia.org/wiki/Bessel_function

    Bessel functions describe the radial part of vibrations of a circular membrane.. Bessel functions, named after Friedrich Bessel who was the first to systematically study them in 1824, [1] are canonical solutions y(x) of Bessel's differential equation + + = for an arbitrary complex number, which represents the order of the Bessel function.

  3. Bessel polynomials - Wikipedia

    en.wikipedia.org/wiki/Bessel_polynomials

    1.6 Orthogonality. 2 Generalization ... Download as PDF; Printable version ... The Bessel polynomial may also be defined using Bessel functions from which the ...

  4. Petersson trace formula - Wikipedia

    en.wikipedia.org/wiki/Petersson_trace_formula

    Download as PDF; Printable version; ... the Petersson trace formula is a kind of orthogonality relation between coefficients of a ... is the Bessel function of the ...

  5. Legendre polynomials - Wikipedia

    en.wikipedia.org/wiki/Legendre_polynomials

    The orthogonality and completeness of this set of solutions follows at once from the larger framework of Sturm–Liouville theory. The differential equation admits another, non-polynomial solution, the Legendre functions of the second kind. A two-parameter generalization of (Eq.

  6. Orthogonal functions - Wikipedia

    en.wikipedia.org/wiki/Orthogonal_functions

    Several sets of orthogonal functions have become standard bases for approximating functions. For example, the sine functions sin nx and sin mx are orthogonal on the interval x ∈ ( − π , π ) {\displaystyle x\in (-\pi ,\pi )} when m ≠ n {\displaystyle m\neq n} and n and m are positive integers.

  7. Fourier–Bessel series - Wikipedia

    en.wikipedia.org/wiki/Fourier–Bessel_series

    The Fourier–Bessel series of a function f(x) with a domain of [0, b] satisfying f(b) = 0. Bessel function for (i) = and (ii) =.: [,] is the representation of that function as a linear combination of many orthogonal versions of the same Bessel function of the first kind J α, where the argument to each version n is differently scaled, according to [1] [2] ():= (,) where u α,n is a root ...

  8. File:Indefinite integrals involving Bessel functions (IA ...

    en.wikipedia.org/wiki/File:Indefinite_integrals...

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  9. Wigner D-matrix - Wikipedia

    en.wikipedia.org/wiki/Wigner_D-matrix

    Download as PDF; Printable version; ... This is a special case of the Schur orthogonality relations. ... is the Bessel function and ...