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  2. Ramanujan summation - Wikipedia

    en.wikipedia.org/wiki/Ramanujan_summation

    Ramanujan summation is a technique invented by the mathematician Srinivasa Ramanujan for assigning a value to divergent infinite series.Although the Ramanujan summation of a divergent series is not a sum in the traditional sense, it has properties that make it mathematically useful in the study of divergent infinite series, for which conventional summation is undefined.

  3. Ramanujan's sum - Wikipedia

    en.wikipedia.org/wiki/Ramanujan's_sum

    In number theory, Ramanujan's sum, usually denoted c q (n), is a function of two positive integer variables q and n defined by the formula = (,) =,where (a, q) = 1 means that a only takes on values coprime to q.

  4. 1 + 2 + 3 + 4 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    The y-intercept of the parabola is ⁠− + 1 / 12 ⁠. [1] The method of regularization using a cutoff function can "smooth" the series to arrive at ⁠− + 1 / 12 ⁠. Smoothing is a conceptual bridge between zeta function regularization, with its reliance on complex analysis, and Ramanujan summation, with its shortcut to the Euler ...

  5. Divergent series - Wikipedia

    en.wikipedia.org/wiki/Divergent_series

    Ramanujan summation is a method of assigning a value to divergent series used by Ramanujan and based on the Euler–Maclaurin summation formula. The Ramanujan sum of a series f (0) + f (1) + ... depends not only on the values of f at integers, but also on values of the function f at non-integral points, so it is not really a summation method in ...

  6. Wikipedia : Reference desk/Archives/Mathematics/2014 January 18

    en.wikipedia.org/wiki/Wikipedia:Reference_desk/...

    1.2 Add up positive numbers to get negative number. 16 comments. 1.2.1 Ramanujan summation: Independent of f, or not? Toggle the table of contents.

  7. 1 + 2 + 4 + 8 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_4_%2B_8_%2B_%E...

    The first four partial sums of 1 + 2 + 4 + 8 + ⋯. In mathematics, 1 + 2 + 4 + 8 + ⋯ is the infinite series whose terms are the successive powers of two. As a geometric series, it is characterized by its first term, 1, and its common ratio, 2. As a series of real numbers it diverges to infinity, so the sum of this series is infinity.

  8. Seeing the number 1212 everywhere? Here's what it might mean

    www.aol.com/seeing-number-1212-everywhere-heres...

    According to numerologists, angel number 1212 suggests harmony and balance are ahead. It's about trusting yourself, and accepting changes with an open mind.

  9. Arithmetic function - Wikipedia

    en.wikipedia.org/wiki/Arithmetic_function

    A related function counts prime powers with weight 1 for primes, 1/2 for their squares, 1/3 for cubes, etc. It is the summation function of the arithmetic function which takes the value 1/ k on integers which are the k -th power of some prime number, and the value 0 on other integers.