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  2. Particular values of the Riemann zeta function - Wikipedia

    en.wikipedia.org/wiki/Particular_values_of_the...

    It is known that ζ(3) is irrational (Apéry's theorem) and that infinitely many of the numbers ζ(2n + 1) : n ∈ , are irrational. [1] There are also results on the irrationality of values of the Riemann zeta function at the elements of certain subsets of the positive odd integers; for example, at least one of ζ (5), ζ (7), ζ (9), or ζ ...

  3. Dividing a circle into areas - Wikipedia

    en.wikipedia.org/wiki/Dividing_a_circle_into_areas

    The number of points (n), chords (c) and regions (r G) for first 6 terms of Moser's circle problem. In geometry, the problem of dividing a circle into areas by means of an inscribed polygon with n sides in such a way as to maximise the number of areas created by the edges and diagonals, sometimes called Moser's circle problem, has a solution by an inductive method.

  4. Cyclic redundancy check - Wikipedia

    en.wikipedia.org/wiki/Cyclic_redundancy_check

    A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to digital data. [1][2] Blocks of data entering these systems get a short check value attached, based on the remainder of a polynomial division of their contents. On retrieval, the calculation is repeated ...

  5. ISO/IEC 27004 - Wikipedia

    en.wikipedia.org/wiki/ISO/IEC_27004

    ISO/IEC 27004 Information Technology – Security techniques – Information Security Management – Measurement. It is part of a family of standards of information security management system (ISMS), which is a systematic approach to securing sensitive information, [1] of ISO/IEC. It provides standards for a robust approach to managing ...

  6. Cesàro summation - Wikipedia

    en.wikipedia.org/wiki/Cesàro_summation

    Cesàro summation. In mathematical analysis, Cesàro summation (also known as the Cesàro mean[1][2] or Cesàro limit[3]) assigns values to some infinite sums that are not necessarily convergent in the usual sense. The Cesàro sum is defined as the limit, as n tends to infinity, of the sequence of arithmetic means of the first n partial sums of ...

  7. Hilbert's sixteenth problem - Wikipedia

    en.wikipedia.org/wiki/Hilbert's_sixteenth_problem

    The first part of Hilbert's 16th problem. In 1876, Harnack investigated algebraic curves in the real projective plane and found that curves of degree n could have no more than. separate connected components. Furthermore, he showed how to construct curves that attained that upper bound, and thus that it was the best possible bound.

  8. Relation (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Relation_(mathematics)

    In mathematics, a relation denotes some kind of relationship between two objects in a set, which may or may not hold. [ 1 ] As an example, " is less than " is a relation on the set of natural numbers; it holds, for instance, between the values 1 and 3 (denoted as 1 < 3), and likewise between 3 and 4 (denoted as 3 < 4), but not between the ...

  9. Cube root law - Wikipedia

    en.wikipedia.org/wiki/Cube_root_law

    The cube root law is an observation in political science that the number of members of a unicameral legislature, or of the lower house of a bicameral legislature, is about the cube root of the population being represented. [ 1 ] The rule was devised by Estonian political scientist Rein Taagepera in his 1972 paper "The size of national assemblies".