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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

    For example, if one starts with Euler's totient function φ, and repeatedly applies the transformation process, one obtains: φ the totient function; φ ∗ 1 = I, where I(n) = n is the identity function; I ∗ 1 = σ 1 = σ, the divisor function; If the starting function is the Möbius function itself, the list of functions is: μ, the Möbius ...

  4. Linear fractional transformation - Wikipedia

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

    An example of such linear fractional transformation is the Cayley transform, which was originally defined on the 3 × 3 real matrix ring. Linear fractional transformations are widely used in various areas of mathematics and its applications to engineering, such as classical geometry , number theory (they are used, for example, in Wiles's proof ...

  5. Mertens function - Wikipedia

    en.wikipedia.org/wiki/Mertens_function

    Mertens function to n = 10 000 Mertens function to n = 10 000 000. In number theory, the Mertens function is defined for all positive integers n as = = (), where () is the Möbius function. The function is named in honour of Franz Mertens.

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

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

    More mysteries surround the Möbius strip. For example, this conjecture only proves the minimum size of a paper Möbius with one twist—not three or more. For such a simple shape, it’s amazing ...

  7. Costco Recalls Its Popular Butter Croissants Due to Contamination

    www.aol.com/costco-recalls-popular-butter...

    Costco’s bakery is one of the most popular departments in the store. The store’s butter croissants are a fan favorite, too, but a notice sent to Costco members who purchased them recently ...

  8. Fiber bundle construction theorem - Wikipedia

    en.wikipedia.org/wiki/Fiber_bundle_construction...

    This can be visualised as a "twisting" of one of the local charts. In mathematics, the fiber bundle construction theorem is a theorem which constructs a fiber bundle from a given base space, fiber and a suitable set of transition functions. The theorem also gives conditions under which two such bundles are isomorphic.

  9. After giving birth, I felt detached from my body. I decided ...

    www.aol.com/news/giving-birth-felt-detached-body...

    Surprisingly, giving birth was amazing. Again, I was lucky and had a quick four-hour labor and delivery — free of complications. I instantly burst into emotional tears when I held my son for the ...