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  2. Multiplicative group of integers modulo n - Wikipedia

    en.wikipedia.org/wiki/Multiplicative_group_of...

    The group (/) is cyclic if and only if n is 1, 2, 4, p k or 2p k, where p is an odd prime and k > 0. For all other values of n the group is not cyclic. [1] [2] [3] This was first proved by Gauss. [4] This means that for these n:

  3. Symbols of grouping - Wikipedia

    en.wikipedia.org/wiki/Symbols_of_grouping

    If we were to express this idea using symbols of grouping, the factors in a product. Example: 2+3×4 = 2 +(3×4)=2+12=14. In understanding expressions without symbols of grouping, it is useful to think of subtraction as addition of the opposite, and to think of division as multiplication by the reciprocal.

  4. Multiplicative group - Wikipedia

    en.wikipedia.org/wiki/Multiplicative_group

    The group scheme of n-th roots of unity is by definition the kernel of the n-power map on the multiplicative group GL(1), considered as a group scheme.That is, for any integer n > 1 we can consider the morphism on the multiplicative group that takes n-th powers, and take an appropriate fiber product of schemes, with the morphism e that serves as the identity.

  5. Multiplication and repeated addition - Wikipedia

    en.wikipedia.org/wiki/Multiplication_and...

    In mathematics education, there was a debate on the issue of whether the operation of multiplication should be taught as being a form of repeated addition.Participants in the debate brought up multiple perspectives, including axioms of arithmetic, pedagogy, learning and instructional design, history of mathematics, philosophy of mathematics, and computer-based mathematics.

  6. Quaternion group - Wikipedia

    en.wikipedia.org/wiki/Quaternion_group

    The red cycle also reflects that i 2 = e, i 3 = i and i 4 = e. In group theory, the quaternion group Q 8 (sometimes just denoted by Q) is a non-abelian group of order eight, isomorphic to the eight-element subset {,,,,,} of the quaternions under multiplication. It is given by the group presentation

  7. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    The form comes with two worksheets, one to calculate exemptions, and another to calculate the effects of other income (second job, spouse's job). The bottom number in each worksheet is used to fill out two if the lines in the main W4 form. The main form is filed with the employer, and the worksheets are discarded or held by the employee.

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