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  2. Character sum - Wikipedia

    en.wikipedia.org/wiki/Character_sum

    In mathematics, a character sum is a sum () of values of a Dirichlet character χ modulo N, taken over a given range of values of n.Such sums are basic in a number of questions, for example in the distribution of quadratic residues, and in particular in the classical question of finding an upper bound for the least quadratic non-residue modulo N.

  3. List of freeware video games - Wikipedia

    en.wikipedia.org/wiki/List_of_freeware_video_games

    This is a selected list of freeware video games implemented as traditional executable files that must be downloaded and installed. Freeware games are games that are released as freeware and can be downloaded and played, free of charge, for an unlimited amount of time. This list does not include: Open source games (see List of open-source video ...

  4. Ramanujan's sum - Wikipedia

    en.wikipedia.org/wiki/Ramanujan's_sum

    Srinivasa Ramanujan mentioned the sums in a 1918 paper. [1] In addition to the expansions discussed in this article, Ramanujan's sums are used in the proof of Vinogradov's theorem that every sufficiently large odd number is the sum of three primes. [2]

  5. Partition function (number theory) - Wikipedia

    en.wikipedia.org/wiki/Partition_function_(number...

    The multiplicative inverse of its generating function is the Euler function; by Euler's pentagonal number theorem this function is an alternating sum of pentagonal number powers of its argument. Srinivasa Ramanujan first discovered that the partition function has nontrivial patterns in modular arithmetic, now known as Ramanujan's congruences.

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  7. 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.

  8. European stocks perk up as markets slow for Thanksgiving - AOL

    www.aol.com/news/asian-stocks-subdued-dollar...

    LONDON/SINGAPORE (Reuters) -European shares ticked up on Thursday after falling the previous day, while Asian stocks slipped, as trading volumes thinned ahead of the U.S. Thanksgiving holiday.

  9. From $245 million bust to Super Bowl contender again: the ...

    www.aol.com/sports/245-million-bust-super-bowl...

    From hero to zero. Ten years ago, Russell Wilson was the talk of the NFL. He had led the Seahawks to a dominant victory at Super Bowl 48, the franchise’s first ever title, in just his second ...