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  2. Natural number - Wikipedia

    en.wikipedia.org/wiki/Natural_number

    [c] Euclid, for example, defined a unit first and then a number as a multitude of units, thus by his definition, a unit is not a number and there are no unique numbers (e.g., any two units from indefinitely many units is a 2). [17] However, in the definition of perfect number which comes shortly afterward, Euclid treats 1 as a number like any ...

  3. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Examples of unexpected applications of mathematical theories can be found in many areas of mathematics. A notable example is the prime factorization of natural numbers that was discovered more than 2,000 years before its common use for secure internet communications through the RSA cryptosystem . [ 127 ]

  4. Slot machine - Wikipedia

    en.wikipedia.org/wiki/Slot_machine

    A theoretical hold worksheet is a document provided by the manufacturer for every slot machine that indicates the theoretical percentage the machine should hold based on the amount paid in. The worksheet also indicates the reel strip settings, number of coins that may be played, the payout schedule, the number of reels and other information ...

  5. San Francisco - Wikipedia

    en.wikipedia.org/wiki/San_Francisco

    San Francisco, [23] officially the City and County of San Francisco, is a commercial, financial, and cultural center within Northern California.With a population of 808,988 residents as of 2023, [14] San Francisco is the fourth-most populous city in the U.S. state of California and the 17th most populous in the U.S.

  6. Microsoft Office - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Office

    The ten-year period is divided into two five-year phases: The mainstream phase and the extended phase. During the mainstream phase, Microsoft may provide limited complimentary technical support and release non-security updates or change the design of the product.

  7. Baden-Württemberg - Wikipedia

    en.wikipedia.org/wiki/Baden-Württemberg

    Baden-Württemberg is formed from the historical territories of Württemberg, Baden and Prussian Hohenzollern. [14] Baden spans along the flat right bank of the river Rhine from north-west to the south (Lake Constance) of the present state, whereas Württemberg and Hohenzollern lay more inland and hillier, including areas such as the Swabian Jura mountain range.

  8. Wavelength-division multiplexing - Wikipedia

    en.wikipedia.org/wiki/Wavelength-division...

    For example, the downstream signal might be at 1310 nm while the upstream signal is at 1550 nm. [ citation needed ] The 10GBASE-LX4 10 Gbit/s physical layer standard is an example of a CWDM system in which four wavelengths near 1310 nm, each carrying a 3.125 Gbit/s data stream, are used to carry 10 Gbit/s of aggregate data.

  9. Mortgage - Wikipedia

    en.wikipedia.org/wiki/Mortgage

    A mortgage loan or simply mortgage (/ ˈ m ɔːr ɡ ɪ dʒ /), in civil law jurisdictions known also as a hypothec loan, is a loan used either by purchasers of real property to raise funds to buy real estate, or by existing property owners to raise funds for any purpose while putting a lien on the property being mortgaged.