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  2. Matrix (mathematics) - Wikipedia

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

    under which addition and multiplication of complex numbers and matrices correspond to each other. For example, 2-by-2 rotation matrices represent the multiplication with some complex number of absolute value 1, as above. A similar interpretation is possible for quaternions [77] and Clifford algebras in general.

  3. 6.5mm Creedmoor - Wikipedia

    en.wikipedia.org/wiki/6.5mm_Creedmoor

    The 6.5mm Creedmoor designated as 6.5 Creedmoor by SAAMI, and as 6,5 Creedmoor by the C.I.P. [4] is a centerfire rifle cartridge introduced by Hornady in 2007. [6]It was developed by Hornady senior ballistics scientist Dave Emary in partnership with Dennis DeMille, the vice-president of product development at Creedmoor Sports, hence the name.

  4. 8.6mm Blackout - Wikipedia

    en.wikipedia.org/wiki/8.6mm_Blackout

    8.6mm Blackout (8.6×43 mm), also sometimes referred to as 8.6 BLK, [1] is a centerfire rifle cartridge developed by the firearms manufacturer Q, LLC. [6] It utilizes a shortened case from the 6.5mm Creedmoor necked up to an 8.6 mm caliber (8.585 mm or 0.338 in diameter) projectile. 8.6 Blackout is designed for use in bolt-action rifles or as a caliber conversion for AR-10 style rifles.

  5. Birthday problem - Wikipedia

    en.wikipedia.org/wiki/Birthday_problem

    The birthday problem in this more generic sense applies to hash functions: the expected number of N-bit hashes that can be generated before getting a collision is not 2 N, but rather only 2 N ⁄ 2. This is exploited by birthday attacks on cryptographic hash functions and is the reason why a small number of collisions in a hash table are, for ...

  6. Usage share of web browsers - Wikipedia

    en.wikipedia.org/wiki/Usage_share_of_web_browsers

    The Firefox Add-ons website reports 15.0 million users of AdBlock variants and 2.2 million users of NoScript. Users behind a caching proxy (e.g. Squid ) may have repeat requests for certain pages served to the browser from the cache, rather than retrieving it again via the Internet.

  7. Chemical element - Wikipedia

    en.wikipedia.org/wiki/Chemical_element

    A chemical element is a chemical substance whose atoms all have the same number of protons.The number of protons is called the atomic number of that element. For example, oxygen has an atomic number of 8, meaning each oxygen atom has 8 protons in its nucleus.

  8. Campaign finance in the United States - Wikipedia

    en.wikipedia.org/wiki/Campaign_finance_in_the...

    For example, a candidate who won an election to the U.S. House of Representatives in 1990 spent on average $407,600 (equivalent to $950,000 in 2023), [1] while the winner in 2022 spent on average $2.79 million; in the Senate, average spending for winning candidates went from $3.87 million (equivalent to $9.03 million in 2023) to $26.53 million ...