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  2. Extraordinary general meeting - Wikipedia

    en.wikipedia.org/wiki/Extraordinary_general_meeting

    An extraordinary general meeting, commonly abbreviated as EGM, is a meeting of members of an organisation, shareholders of a company, or employees of an official body that occurs at an irregular time. [1]

  3. Collatz conjecture - Wikipedia

    en.wikipedia.org/wiki/Collatz_conjecture

    For instance, the first counterexample must be odd because f(2n) = n, smaller than 2n; and it must be 3 mod 4 because f 2 (4n + 1) = 3n + 1, smaller than 4n + 1. For each starting value a which is not a counterexample to the Collatz conjecture, there is a k for which such an inequality holds, so checking the Collatz conjecture for one starting ...

  4. Other examples of this class of compound have been made; many inorganic chemists are now using Fc 2 P 2 S 4 (Fc = ferrocene) as a starting material in reactions investigating the general chemistry of the 1,3,2,4-dithiadiphosphetane 2,4-disulfides, one reaction for this is that the Fc 2 P 2 S 4 compound and all its derivatives are red which make ...

  5. Resolution (algebra) - Wikipedia

    en.wikipedia.org/wiki/Resolution_(algebra)

    In mathematics, and more specifically in homological algebra, a resolution (or left resolution; dually a coresolution or right resolution [1]) is an exact sequence of modules (or, more generally, of objects of an abelian category) that is used to define invariants characterizing the structure of a specific module or object of this category.

  6. Resolution (structural biology) - Wikipedia

    en.wikipedia.org/wiki/Resolution_(structural...

    In structural biology, resolution can be broken down into 4 groups: (1) sub-atomic, when information about the electron density is obtained and quantum effects can be studied, (2) atomic, individual atoms are visible and an accurate three-dimensional model can be constructed, (3) helical, secondary structure, such as alpha helices and beta sheets; RNA helices (in ribosomes), (4) domain, no ...

  7. Earth Gravitational Model - Wikipedia

    en.wikipedia.org/wiki/Earth_Gravitational_Model

    It provides a raster of 2.5′×2.5′ and an accuracy approaching 10 cm. 11' is also available [7] in non-float but lossless PGM, [5] [8] but original .gsb files are better. [9] Indeed, some libraries like GeographicLib use uncompressed PGM, but it is not original float data as was present in .gsb format.

  8. 1 + 2 + 3 + 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    The divergence is a simple consequence of the form of the series: the terms do not approach zero, ... (1 + x) 2 ⁠ which is 1 − 2x + 3x^24x^3 + ...

  9. Borel functional calculus - Wikipedia

    en.wikipedia.org/wiki/Borel_functional_calculus

    [1] [2] Thus for instance if T is an operator, applying the squaring function s → s 2 to T yields the operator T 2. Using the functional calculus for larger classes of functions, we can for example define rigorously the "square root" of the (negative) Laplacian operator −Δ or the exponential e i t Δ . {\displaystyle e^{it\Delta }.}