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  2. Harmonic function - Wikipedia

    en.wikipedia.org/wiki/Harmonic_function

    Each function above will yield another harmonic function when multiplied by a constant, rotated, and/or has a constant added. The inversion of each function will yield another harmonic function which has singularities which are the images of the original singularities in a spherical "mirror". Also, the sum of any two harmonic functions will ...

  3. Spherical harmonics - Wikipedia

    en.wikipedia.org/wiki/Spherical_harmonics

    As suggested in the introduction, this perspective is presumably the origin of the term “spherical harmonic” (i.e., the restriction to the sphere of a harmonic function). For example, for any the formula (,,) = (+) defines a homogeneous polynomial of degree with domain and codomain , which happens to be independent of . This polynomial is ...

  4. Harmonic analysis - Wikipedia

    en.wikipedia.org/wiki/Harmonic_analysis

    Harmonic analysis is a branch of mathematics concerned with investigating the connections between a function and its representation in frequency.The frequency representation is found by using the Fourier transform for functions on unbounded domains such as the full real line or by Fourier series for functions on bounded domains, especially periodic functions on finite intervals.

  5. Category:Harmonic functions - Wikipedia

    en.wikipedia.org/wiki/Category:Harmonic_functions

    Download as PDF; Printable version; In other projects Wikidata item; ... Pages in category "Harmonic functions" The following 26 pages are in this category, out of 26 ...

  6. Potential theory - Wikipedia

    en.wikipedia.org/wiki/Potential_theory

    In mathematics and mathematical physics, potential theory is the study of harmonic functions.. The term "potential theory" was coined in 19th-century physics when it was realized that two fundamental forces of nature known at the time, namely gravity and the electrostatic force, could be modeled using functions called the gravitational potential and electrostatic potential, both of which ...

  7. Table of spherical harmonics - Wikipedia

    en.wikipedia.org/wiki/Table_of_spherical_harmonics

    The saturation of the color at any point represents the magnitude of the spherical harmonic and the hue represents the phase. The nodal 'line of latitude' are visible as horizontal white lines. The nodal 'line of longitude' are visible as vertical white lines. Visual Array of Complex Spherical Harmonics Represented as 2D Theta/Phi Maps

  8. Harmonic mean - Wikipedia

    en.wikipedia.org/wiki/Harmonic_mean

    Download as PDF; Printable version; ... For example, the harmonic mean of 1, 4, and 4 is ... The harmonic mean is a Schur-concave function, ...

  9. Harmonic conjugate - Wikipedia

    en.wikipedia.org/wiki/Harmonic_conjugate

    Equivalently, is conjugate to in if and only if and satisfy the Cauchy–Riemann equations in . As an immediate consequence of the latter equivalent definition, if is any harmonic function on , the function is conjugate to for then the Cauchy–Riemann equations are just = and the symmetry of the mixed second order derivatives, =.