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  2. Modular arithmetic - Wikipedia

    en.wikipedia.org/wiki/Modular_arithmetic

    Adding 4 hours to 9 o'clock gives 1 o'clock, since 13 is congruent to 1 modulo 12. In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers "wrap around" when reaching a certain value, called the modulus. The modern approach to modular arithmetic was developed by Carl Friedrich Gauss in his book Disquisitiones ...

  3. Multiplication algorithm - Wikipedia

    en.wikipedia.org/wiki/Multiplication_algorithm

    For 8-bit integers the table of quarter squares will have 2 9 −1=511 entries (one entry for the full range 0..510 of possible sums, the differences using only the first 256 entries in range 0..255) or 2 9 −1=511 entries (using for negative differences the technique of 2-complements and 9-bit masking, which avoids testing the sign of ...

  4. Modulo - Wikipedia

    en.wikipedia.org/wiki/Modulo

    [1] For example, the expression "5 mod 2" evaluates to 1, because 5 divided by 2 has a quotient of 2 and a remainder of 1, while "9 mod 3" would evaluate to 0, because 9 divided by 3 has a quotient of 3 and a remainder of 0. Although typically performed with a and n both being integers, many computing systems now allow other types of numeric ...

  5. Principles and Practice of Engineering exam - Wikipedia

    en.wikipedia.org/wiki/Principles_and_Practice_of...

    The Principles and Practice of Engineering exam is the examination required for one to become a Professional Engineer (PE) in the United States. It is the second exam required, coming after the Fundamentals of Engineering exam. Upon passing the PE exam and meeting other eligibility requirements, that vary by state, such as education and ...

  6. Multiplicative group of integers modulo n - Wikipedia

    en.wikipedia.org/wiki/Multiplicative_group_of...

    The set {3,19} generates the group, which means that every element of (/) is of the form 3 a × 19 b (where a is 0, 1, 2, or 3, because the element 3 has order 4, and similarly b is 0 or 1, because the element 19 has order 2). Smallest primitive root mod n are (0 if no root exists)

  7. Petlyakov Pe-8 - Wikipedia

    en.wikipedia.org/wiki/Petlyakov_Pe-8

    1936–1944. Introduction date. 1940. First flight. 27 December 1936. The Petlyakov Pe-8 (Russian: Петляков Пе-8) was a Soviet heavy bomber designed before World War II, and the only four-engine bomber the USSR built during the war. Produced in limited numbers, it was used to bomb Berlin in August 1941. It was also used for so-called ...

  8. Wilson's theorem - Wikipedia

    en.wikipedia.org/wiki/Wilson's_theorem

    Wilson's theorem. In algebra and number theory, Wilson's theorem states that a natural number n > 1 is a prime number if and only if the product of all the positive integers less than n is one less than a multiple of n. That is (using the notations of modular arithmetic), the factorial satisfies. exactly when n is a prime number.

  9. Wikipedia : WikiProject Aviation/Assessment/Petlyakov Pe-8

    en.wikipedia.org/.../Assessment/Petlyakov_Pe-8

    Petlyakov Pe-8 [edit] I think that this article meets all the requirements for an A-class article, although the lead may need to be lengthened. Suggestions are welcome.--. Sturmvogel 66 ( talk) 18:44, 4 January 2010 (UTC) Reply[ reply] No problems reported with alt text or dab links. One external link is reported as suspicious, please check and ...