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  2. 142857 - Wikipedia

    en.wikipedia.org/wiki/142857

    142857 is the best-known cyclic number in base 10, being the six repeating digits of ⁠ 1 / 7 ⁠ (0. 142857). [2] [3] [4] [5]If 142857 is multiplied by 2, 3, 4, 5 ...

  3. Repeating decimal - Wikipedia

    en.wikipedia.org/wiki/Repeating_decimal

    For example, in duodecimal, ⁠ 1 / 2 ⁠ = 0.6, ⁠ 1 / 3 ⁠ = 0.4, ⁠ 1 / 4 ⁠ = 0.3 and ⁠ 1 / 6 ⁠ = 0.2 all terminate; ⁠ 1 / 5 ⁠ = 0. 2497 repeats with period length 4, in contrast with the equivalent decimal expansion of 0.2; ⁠ 1 / 7 ⁠ = 0. 186A35 has period 6 in duodecimal, just as it does in decimal.

  4. Bernoulli number - Wikipedia

    en.wikipedia.org/wiki/Bernoulli_number

    21 / 6 ⁠ +0.166666666 3: 0 +0.000000000 4: ... [37] rediscovered Seidel's algorithm and later Millar, Sloane and Young popularized Seidel's algorithm under the ...

  5. Overline - Wikipedia

    en.wikipedia.org/wiki/Overline

    1.2.6 Complex numbers. 1.2.7 Vector. ... An overline, overscore, or overbar, is a typographical feature of a horizontal line drawn immediately above the text.

  6. Basel problem - Wikipedia

    en.wikipedia.org/wiki/Basel_problem

    The Basel problem is a problem in mathematical analysis with relevance to number theory, concerning an infinite sum of inverse squares.It was first posed by Pietro Mengoli in 1650 and solved by Leonhard Euler in 1734, [1] and read on 5 December 1735 in The Saint Petersburg Academy of Sciences. [2]

  7. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]

  8. Ternary numeral system - Wikipedia

    en.wikipedia.org/wiki/Ternary_numeral_system

    For example, decimal 365 (10) or senary 1 405 (6) corresponds to binary 1 0110 1101 (2) (nine bits) and to ternary 111 112 (3) (six digits). However, they are still far less compact than the corresponding representations in bases such as decimal – see below for a compact way to codify ternary using nonary (base 9) and septemvigesimal (base 27).

  9. Zero to the power of zero - Wikipedia

    en.wikipedia.org/wiki/Zero_to_the_power_of_zero

    Zero to the power of zero, denoted as 0 0, is a mathematical expression that can take different values depending on the context. In certain areas of mathematics, such as combinatorics and algebra, 0 0 is conventionally defined as 1 because this assignment simplifies many formulas and ensures consistency in operations involving exponents.