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  2. Möbius function - Wikipedia

    en.wikipedia.org/wiki/Möbius_function

    The Möbius function () is a multiplicative function in number theory introduced by the German mathematician August Ferdinand Möbius (also transliterated Moebius) in 1832. [ i ] [ ii ] [ 2 ] It is ubiquitous in elementary and analytic number theory and most often appears as part of its namesake the Möbius inversion formula .

  3. Möbius inversion formula - Wikipedia

    en.wikipedia.org/wiki/Möbius_inversion_formula

    If the starting function is the Möbius function itself, the list of functions is: μ, the Möbius function; μ ∗ 1 = ε where () = {, =, > is the unit function; ε ∗ 1 = 1, the constant function; 11 = σ 0 = d = τ, where d = τ is the number of divisors of n, (see divisor function).

  4. Symbolab - Wikipedia

    en.wikipedia.org/wiki/Symbolab

    Symbolab is an answer engine [1] that provides step-by-step solutions to mathematical problems in a range of subjects. [2] It was originally developed by Israeli start-up company EqsQuest Ltd., under whom it was released for public use in 2011. In 2020, the company was acquired by American educational technology website Course Hero. [3] [4]

  5. List of open-source software for mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_open-source...

    It was originally known as "HECKE and Manin". After a short while it was renamed SAGE, which stands for ‘’Software of Algebra and Geometry Experimentation’’. Sage 0.1 was released in 2005 and almost a year later Sage 1.0 was released. It already consisted of Pari, GAP, Singular and Maxima with an interface that rivals that of Mathematica.

  6. Linear fractional transformation - Wikipedia

    en.wikipedia.org/wiki/Linear_fractional...

    [3] [4] The general procedure of combining linear fractional transformations with the Redheffer star product allows them to be applied to the scattering theory of general differential equations, including the S-matrix approach in quantum mechanics and quantum field theory, the scattering of acoustic waves in media (e.g. thermoclines and ...

  7. Möbius transformation - Wikipedia

    en.wikipedia.org/wiki/Möbius_transformation

    There are 3 representatives fixing {0, 1, ∞}, which are the three transpositions in the symmetry group of these 3 points: /, which fixes 1 and swaps 0 with ∞ (rotation by 180° about the points 1 and −1), , which fixes ∞ and swaps 0 with 1 (rotation by 180° about the points 1/2 and ∞), and / which fixes 0 and swaps 1 with ∞ ...

  8. The Möbius Mystery Has Stumped Mathematicians for 46 ... - AOL

    www.aol.com/lifestyle/m-bius-mystery-stumped...

    In a paper published on the preprint server arXiv, Schwartz solves the nearly 50-year-old mystery and finally proves the minimum size proposed by the original Halpern-Weaver conjecture—an aspect ...

  9. Gauss congruence - Wikipedia

    en.wikipedia.org/wiki/Gauss_congruence

    In mathematics, Gauss congruence is a property held by certain sequences of integers, including the Lucas numbers and the divisor sum sequence. Sequences satisfying this property are also known as Dold sequences, Fermat sequences, Newton sequences, and realizable sequences. [1]

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