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  2. Google Sheets - Wikipedia

    en.wikipedia.org/wiki/Google_Sheets

    Google offers an extension for the Google Chrome web browser called Office editing for Docs, Sheets and Slides that enables users to view and edit Microsoft Excel documents on Google Chrome, via the Google Sheets app. The extension can be used for opening Excel files stored on the computer using Chrome, as well as for opening files encountered ...

  3. Page numbering - Wikipedia

    en.wikipedia.org/wiki/Page_numbering

    The number itself, which may appear in various places on the page, can be referred to as a page number or as a folio. [1] Like other numbering schemes such as chapter numbering, page numbers allow the citation of a particular page of the numbered document and facilitates to the reader to find specific parts of the document and to know the size ...

  4. Linking number - Wikipedia

    en.wikipedia.org/wiki/Linking_number

    The self-linking number obtained by moving vertically (along the blackboard framing) is known as Kauffman's self-linking number. The linking number is defined for two linked circles; given three or more circles, one can define the Milnor invariants , which are a numerical invariant generalizing linking number.

  5. Formula for primes - Wikipedia

    en.wikipedia.org/wiki/Formula_for_primes

    Because the set of primes is a computably enumerable set, by Matiyasevich's theorem, it can be obtained from a system of Diophantine equations. Jones et al. (1976) found an explicit set of 14 Diophantine equations in 26 variables, such that a given number k + 2 is prime if and only if that system has a solution in nonnegative integers: [7]

  6. Generalized Riemann hypothesis - Wikipedia

    en.wikipedia.org/wiki/Generalized_Riemann_hypothesis

    The extended Riemann hypothesis asserts that for every number field K and every complex number s with ζ K (s) = 0: if the real part of s is between 0 and 1, then it is in fact 1/2. The ordinary Riemann hypothesis follows from the extended one if one takes the number field to be Q, with ring of integers Z.