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  2. Natural number - Wikipedia

    en.wikipedia.org/wiki/Natural_number

    While it is in general not possible to divide one natural number by another and get a natural number as result, the procedure of division with remainder or Euclidean division is available as a substitute: for any two natural numbers a and b with b ≠ 0 there are natural numbers q and r such that = + <.

  3. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    [12] [6] The 2020 Mathematics Subject Classification contains no less than sixty-three first-level areas. [13] Some of these areas correspond to the older division, as is true regarding number theory (the modern name for higher arithmetic) and geometry. Several other first-level areas have "geometry" in their names or are otherwise commonly ...

  4. Caribbean - Wikipedia

    en.wikipedia.org/wiki/Caribbean

    The Caribbean (/ ˌ k ær ɪ ˈ b iː ən, k ə ˈ r ɪ b i ən / KARR-ib-EE-ən, kə-RIB-ee-ən, locally / ˈ k ær ɪ b i æ n / KARR-ib-ee-an; [4] Spanish: el Caribe; French: les Caraïbes; Dutch: de Caraïben) is a subregion in the middle of the Americas centered around the Caribbean Sea in the North Atlantic Ocean, mostly overlapping with the West Indies.

  5. History of the Americas - Wikipedia

    en.wikipedia.org/wiki/History_of_the_Americas

    [12] [13] Certain genetic diversity patterns from West to East suggest, particularly in South America, that migration proceeded first down the west coast, and then proceeded eastward. [14] Geneticists have variously estimated that peoples of Asia and the Americas were part of the same population from 42,000 to 21,000 years ago.

  6. Human migration - Wikipedia

    en.wikipedia.org/wiki/Human_migration

    Human migration is the movement of people from one place to another, [1] with intentions of settling, permanently or temporarily, at a new location (geographic region). The movement often occurs over long distances and from one country to another (external migration), but internal migration (within a single country) is the dominant form of human migration globally.

  7. Georg Ohm - Wikipedia

    en.wikipedia.org/wiki/Georg_Ohm

    Georg Simon Ohm (/ oʊ m /; [1] German: [ˈɡeːɔʁk ˈʔoːm]; [2] [3] 16 March 1789 – 6 July 1854) was a German mathematician and physicist.As a school teacher, Ohm began his research with the new electrochemical cell, invented by Italian scientist Alessandro Volta.

  8. Tsardom of Russia - Wikipedia

    en.wikipedia.org/wiki/Tsardom_of_Russia

    Historians have not determined whether policy differences, personal animosities, or mental imbalance caused his wrath. In 1565, he divided Russia into two parts: his private domain (or oprichnina) and the public realm (or zemshchina). For his private domain, Ivan chose some of the most prosperous and important districts of Russia.