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  2. English numerals - Wikipedia

    en.wikipedia.org/wiki/English_numerals

    Alternatively, and for greater numbers, one may say for 12 "one over two", for 5 ⁄ 8 "five over eight", and so on. This "over" form is also widely used in mathematics. Fractions together with an integer are read as follows: 1 + 12 is "one and a half" 6 + 1 ⁄ 4 is "six and a quarter" 7 + 5 ⁄ 8 is "seven and five eighths"

  3. Mathematical proof - Wikipedia

    en.wikipedia.org/wiki/Mathematical_proof

    For example, we can prove by induction that all positive integers of the form 2n − 1 are odd. Let P(n) represent "2n − 1 is odd": (i) For n = 1, 2n − 1 = 2(1) − 1 = 1, and 1 is odd, since it leaves a remainder of 1 when divided by 2. Thus P(1) is true.

  4. Saturation arithmetic - Wikipedia

    en.wikipedia.org/wiki/Saturation_arithmetic

    In hardware, modular arithmetic with a minimum of zero and a maximum of r n − 1, where r is the radix, can be implemented by simply discarding all but the lowest n digits. For binary hardware, which the vast majority of modern hardware is, the radix is 2, and the digits are bits.

  5. Approximate number system - Wikipedia

    en.wikipedia.org/wiki/Approximate_number_system

    The approximate number system (ANS) is a cognitive system that supports the estimation of the magnitude of a group without relying on language or symbols. The ANS is credited with the non-symbolic representation of all numbers greater than four, with lesser values being carried out by the parallel individuation system, or object tracking system. [1]

  6. List of limits - Wikipedia

    en.wikipedia.org/wiki/List_of_limits

    [1] [2] This applies even in the cases that f(x) and g(x) take on different values at c, or are discontinuous at c. Polynomials and functions of the form x a

  7. Percent sign - Wikipedia

    en.wikipedia.org/wiki/Percent_sign

    The percent sign % (sometimes per cent sign in British English) is the symbol used to indicate a percentage, a number or ratio as a fraction of 100. Related signs include the permille (per thousand) sign ‰ and the permyriad (per ten thousand) sign ‱ (also known as a basis point), which indicate that a number is divided by one thousand or ten thousand, respectively.

  8. Real-valued function - Wikipedia

    en.wikipedia.org/wiki/Real-valued_function

    A domain of a real smooth function can be the real coordinate space (which yields a real multivariable function), a topological vector space, [1] an open subset of them, or a smooth manifold. Spaces of smooth functions also are vector spaces and algebras as explained above in § Algebraic structure and are subspaces of the space of continuous ...

  9. Large numbers - Wikipedia

    en.wikipedia.org/wiki/Large_numbers

    The second term in the definition of Graham's number, g 2 = 3 ↑ g 1 3 > 10 ...