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  2. 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 ...

  3. Column: Older drivers reveal strategies for passing that ...

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    Drivers are still finding "obscure and ridiculous" questions when they have to take the written driving test at the DMV. (Irfan Khan / Los Angeles Times) I wouldn’t call it an atmospheric river ...

  4. Column: For drivers 70 and older, the road rage over DMV test ...

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    Confusing. Trivial. Useless. Laughable. Inconsistent. The road rage over DMV test questions continues for drivers 70 and older.

  5. Quadratic Gauss sum - Wikipedia

    en.wikipedia.org/wiki/Quadratic_Gauss_sum

    In number theory, quadratic Gauss sums are certain finite sums of roots of unity. A quadratic Gauss sum can be interpreted as a linear combination of the values of the complex exponential function with coefficients given by a quadratic character; for a general character, one obtains a more general Gauss sum .

  6. Divisor sum identities - Wikipedia

    en.wikipedia.org/wiki/Divisor_sum_identities

    The purpose of this page is to catalog new, interesting, and useful identities related to number-theoretic divisor sums, i.e., sums of an arithmetic function over the divisors of a natural number , or equivalently the Dirichlet convolution of an arithmetic function () with one:

  7. Convergence tests - Wikipedia

    en.wikipedia.org/wiki/Convergence_tests

    In this sense, the partial sums are Cauchy only if this limit exists and is equal to zero. The test is inconclusive if the limit of the summand is zero. This is also known as the nth-term test, test for divergence, or the divergence test.

  8. 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 ]

  9. Elliptic Gauss sum - Wikipedia

    en.wikipedia.org/wiki/Elliptic_Gauss_sum

    In mathematics, an elliptic Gauss sum is an analog of a Gauss sum depending on an elliptic curve with complex multiplication. The quadratic residue symbol in a Gauss sum is replaced by a higher residue symbol such as a cubic or quartic residue symbol, and the exponential function in a Gauss sum is replaced by an elliptic function.

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