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  2. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...

  3. Names of large numbers - Wikipedia

    en.wikipedia.org/wiki/Names_of_large_numbers

    The name of a number 10 3n+3, where n is greater than or equal to 1000, is formed by concatenating the names of the numbers of the form 10 3m+3, where m represents each group of comma-separated digits of n, with each but the last "-illion" trimmed to "-illi-", or, in the case of m = 0, either "-nilli-" or "-nillion". [15]

  4. Number sign - Wikipedia

    en.wikipedia.org/wiki/Number_sign

    The use of # as an abbreviation for "number" is common in informal writing, but use in print is rare. [ 44] Where Americans might write "Symphony #5", British and Irish people usually write "Symphony No. 5". [citation needed] When # is after a number, it is read as "pound" or "pounds", meaning the unit of weight.

  5. Numeral prefix - Wikipedia

    en.wikipedia.org/wiki/Numeral_prefix

    Numeral prefix. Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and many other languages, they are used to coin numerous series of words. For example: In many European languages there are two principal systems, taken from Latin and Greek, each with several subsystems; in addition, Sanskrit ...

  6. Number - Wikipedia

    en.wikipedia.org/wiki/Number

    A computable number, also known as recursive number, is a real number such that there exists an algorithm which, given a positive number n as input, produces the first n digits of the computable number's decimal representation.

  7. House numbering - Wikipedia

    en.wikipedia.org/wiki/House_numbering

    House numbering is the system of giving a unique number to each building in a street or area, with the intention of making it easier to locate a particular building. The house number is often part of a postal address. The term describes the number of any building (residential or commercial) with a mailbox, or even a vacant lot.

  8. National identification number - Wikipedia

    en.wikipedia.org/wiki/National_identification_number

    The identification number has 8-digit standard format: NNNNNNN (N), where N is a numeric digit 0–9. The first numeric digit N has special meaning, and it can be one of the following digits: '1', '5' or '7'. '1': The first-time date of issuance of ID card to the bearer was 1992 or later.

  9. Natural number - Wikipedia

    en.wikipedia.org/wiki/Natural_number

    A natural number can be used to express the size of a finite set; more precisely, a cardinal number is a measure for the size of a set, which is even suitable for infinite sets. The numbering of cardinals usually begins at zero, to accommodate the empty set. ∅ {\displaystyle \emptyset }