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  2. Verhoeff algorithm - Wikipedia

    en.wikipedia.org/wiki/Verhoeff_algorithm

    Verhoeff had the goal of finding a decimal code—one where the check digit is a single decimal digit—which detected all single-digit errors and all transpositions of adjacent digits. At the time, supposed proofs of the nonexistence [6] of these codes made base-11 codes popular, for example in the ISBN check digit.

  3. Checksum - Wikipedia

    en.wikipedia.org/wiki/Checksum

    The content of such spam may often vary in its details, which would render normal checksumming ineffective. By contrast, a "fuzzy checksum" reduces the body text to its characteristic minimum, then generates a checksum in the usual manner. This greatly increases the chances of slightly different spam emails producing the same checksum.

  4. Check digit - Wikipedia

    en.wikipedia.org/wiki/Check_digit

    The final digit of a Universal Product Code, International Article Number, Global Location Number or Global Trade Item Number is a check digit computed as follows: [3] [4]. Add the digits in the odd-numbered positions from the left (first, third, fifth, etc.—not including the check digit) together and multiply by three.

  5. Damm algorithm - Wikipedia

    en.wikipedia.org/wiki/Damm_algorithm

    The Damm algorithm is similar to the Verhoeff algorithm.It too will detect all occurrences of the two most frequently appearing types of transcription errors, namely altering a single digit or transposing two adjacent digits (including the transposition of the trailing check digit and the preceding digit).

  6. Jacobus Verhoeff - Wikipedia

    en.wikipedia.org/wiki/Jacobus_Verhoeff

    Jacobus "Koos" Verhoeff (20 February 1927 – 19 March 2018) [3] was a Dutch mathematician, computer scientist, and artist.

  7. What is a certified check? Definition, uses and cost - AOL

    www.aol.com/finance/certified-check-definition...

    Portions of this article were drafted using an in-house natural language generation platform.The article was reviewed, fact-checked and edited by our editorial staff.. A certified check is often ...

  8. Mathematical psychology - Wikipedia

    en.wikipedia.org/wiki/Mathematical_psychology

    Mathematical psychology is an approach to psychological research that is based on mathematical modeling of perceptual, thought, cognitive and motor processes, and on the establishment of law-like rules that relate quantifiable stimulus characteristics with quantifiable behavior (in practice often constituted by task performance).

  9. What Is a Cashier’s Check? Definition, Fees and How To Buy

    www.aol.com/finance/cashier-check-one-214301311.html

    A cashier's check is issued by the bank, signed by the cashier and guarantees payment. It can be used to make large purchases. Here's a total guide.