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  2. Square-root sum problem - Wikipedia

    en.wikipedia.org/wiki/Square-root_sum_problem

    The main difficulty is that, in order to solve the problem, the square-roots should be computed to a high accuracy, which may require a large number of bits. The problem is mentioned in the Open Problems Garden. [4] Blomer [5] presents a polynomial-time Monte Carlo algorithm for deciding whether a

  3. Gauss sum - Wikipedia

    en.wikipedia.org/wiki/Gauss_sum

    In algebraic number theory, a Gauss sum or Gaussian sum is a particular kind of finite sum of roots of unity, typically ():= (,) = ()where the sum is over elements r of some finite commutative ring R, ψ is a group homomorphism of the additive group R + into the unit circle, and χ is a group homomorphism of the unit group R × into the unit circle, extended to non-unit r, where it takes the ...

  4. Vieta's formulas - Wikipedia

    en.wikipedia.org/wiki/Vieta's_formulas

    Vieta's formulas are frequently used with polynomials with coefficients in any integral domain R.Then, the quotients / belong to the field of fractions of R (and possibly are in R itself if happens to be invertible in R) and the roots are taken in an algebraically closed extension.

  5. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    Starting from the rightmost digit, each pair of digits is added together. The rightmost digit of the sum is written below them. If the sum is a two-digit number then the leftmost digit, called the "carry", is added to the next pair of digits to the left. This process is repeated until all digits have been added. [65]

  6. Ramanujan's sum - Wikipedia

    en.wikipedia.org/wiki/Ramanujan's_sum

    Therefore, there are φ(q) primitive q-th roots of unity. Thus, the Ramanujan sum c q (n) is the sum of the n-th powers of the primitive q-th roots of unity. It is a fact [3] that the powers of ζ q are precisely the primitive roots for all the divisors of q. Example. Let q = 12. Then

  7. 26-year-old California man mauled by his 3 dogs; animals ...

    www.aol.com/news/26-old-california-man-mauled...

    Dog attacks: Family dogs kill 5-year-old California girl in backyard. Second victim suffered 'serious bite injuries' The next day, the San Diego Humane Society got in touch with another bystander ...

  8. Cubic equation - Wikipedia

    en.wikipedia.org/wiki/Cubic_equation

    This allows computing the multiple root, and the third root can be deduced from the sum of the roots, which is provided by Vieta's formulas. A difference with other characteristics is that, in characteristic 2, the formula for a double root involves a square root, and, in characteristic 3, the formula for a triple root involves a cube root.

  9. Why The World Seems To Fall Silent After A Fresh Snow - AOL

    www.aol.com/why-world-seems-fall-silent...

    The science of silent snowflakes: The most common type of snowflake, called a dendrite, has six "arms" extending out from the center of the flake. While falling toward the ground, these dendrites ...

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