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  2. Pfister's sixteen-square identity - Wikipedia

    en.wikipedia.org/wiki/Pfister's_sixteen-square...

    In algebra, Pfister's sixteen-square identity is a non-bilinear identity of form (+ + + +) (+ + + +) = + + + +It was first proven to exist by H. Zassenhaus and W. Eichhorn in the 1960s, [1] and independently by Albrecht Pfister [2] around the same time.

  3. Closure (The X-Files) - Wikipedia

    en.wikipedia.org/wiki/Closure_(The_X-Files)

    [19] Jeremy Conrad from IGN referred to the episode as "excellent" and noted that a large portion of The X-Files mythology ended with the resolution of Samantha's abduction, saying, "['Closure' is] a final, and concrete, answer to the single thing that was driving Mulder for the entire run of the series.

  4. Look-and-say sequence - Wikipedia

    en.wikipedia.org/wiki/Look-and-say_sequence

    1, 11, 21, 1211, 111221, 312211, 13112221, 1113213211, 31131211131221, ... (sequence A005150 in the OEIS). To generate a member of the sequence from the previous member, read off the digits of the previous member, counting the number of digits in groups of the same digit. For example: 1 is read off as "one 1" or 11. 11 is read off as "two 1s ...

  5. 6-year-old provides the most genius answer to his math problem

    www.aol.com/news/2015-11-04-6-year-old-provides...

    Updated July 14, 2016 at 7:42 PM Kid Gives Best Response For Simple Math Problem Sometimes the way kids respond to math tests are incredibly funny and even smarter than the answers their teachers ...

  6. 11 (number) - Wikipedia

    en.wikipedia.org/wiki/11_(number)

    11 is a prime number, and a super-prime. 11 forms a twin prime with 13, [6] and sexy pair with 5 and 17. The first prime exponent that does not yield a Mersenne prime is 11. 11 is part of a pair of Brown numbers. Only three such pairs of numbers are known. [citation needed] Rows in Pascal's triangle can be seen as representation of powers of 11 ...

  7. Multiplication sign - Wikipedia

    en.wikipedia.org/wiki/Multiplication_sign

    The lower-case Latin letter x is sometimes used in place of the multiplication sign. This is considered incorrect in mathematical writing. This is considered incorrect in mathematical writing. In algebraic notation, widely used in mathematics, a multiplication symbol is usually omitted wherever it would not cause confusion: " a multiplied by b ...

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  9. Product (mathematics) - Wikipedia

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

    In mathematics, a product is the result of multiplication, or an expression that identifies objects (numbers or variables) to be multiplied, called factors.For example, 21 is the product of 3 and 7 (the result of multiplication), and (+) is the product of and (+) (indicating that the two factors should be multiplied together).