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  2. List of countries by income inequality - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    The Gini coefficient is a number between 0 and 1 or 100, where 0 represents perfect equality (everyone has the same income), while an index of 1 or 100 implies perfect inequality (one person has all the income and everyone else has no income).

  3. Gini coefficient - Wikipedia

    en.wikipedia.org/wiki/Gini_coefficient

    A Gini coefficient of 0 reflects perfect equality, where all income or wealth values are the same, while a Gini coefficient of 1 (or 100%) reflects maximal inequality among values, a situation where a single individual has all the income while all others have none. [3] [4]

  4. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    The term algebra is derived from the Arabic word al-jabr meaning 'the reunion of broken parts' that he used for naming one of these methods in the title of his main treatise. [31] [32] Algebra became an area in its own right only with François Viète (1540–1603), who introduced the use of variables for representing unknown or unspecified ...

  5. Misery index (economics) - Wikipedia

    en.wikipedia.org/wiki/Misery_index_(economics)

    Harvard Economist Robert Barro created what he dubbed the "Barro Misery Index" (BMI), in 1999. [3] The BMI takes the sum of the inflation and unemployment rates, and adds to that the interest rate, plus (minus) the shortfall (surplus) between the actual and trend rate of GDP growth.

  6. Cyclic redundancy check - Wikipedia

    en.wikipedia.org/wiki/Cyclic_redundancy_check

    The polynomial is written in binary as the coefficients; a 3rd-degree polynomial has 4 coefficients (1x 3 + 0x 2 + 1x + 1). In this case, the coefficients are 1, 0, 1 and 1. The result of the calculation is 3 bits long, which is why it is called a 3-bit CRC. However, you need 4 bits to explicitly state the polynomial. Start with the message to ...

  7. Energy density - Wikipedia

    en.wikipedia.org/wiki/Energy_density

    This energy can be released by the processes of nuclear fission (~ 0.1%), nuclear fusion (~ 1%), or the annihilation of some or all of the matter in the volume V by matter–antimatter collisions (100%). [citation needed] The most effective ways of accessing this energy, aside from antimatter, are fusion and fission. Fusion is the process by ...

  8. William James Sidis - Wikipedia

    en.wikipedia.org/wiki/William_James_Sidis

    This is an accepted version of this page This is the latest accepted revision, reviewed on 5 February 2025. American child prodigy (1898–1944) William James Sidis Sidis at his Harvard graduation (1914) Born (1898-04-01) April 1, 1898 Boston, Massachusetts, U.S. Died July 17, 1944 (1944-07-17) (aged 46) Boston, Massachusetts, U.S. Other names John W. Shattuck Frank Folupa Parker Greene Jacob ...

  9. List of countries by past and future population density

    en.wikipedia.org/wiki/List_of_countries_by_past...

    This is a list of countries showing past and future population density, ranging from 1950 to 2300, as estimated by the 2017 revision of the World Population Prospects database by the United Nations Population Division.