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  2. 122 (number) - Wikipedia

    en.wikipedia.org/wiki/122_(number)

    122 is a nontotient since there is no integer with exactly 122 coprimes below it. Nor is there an integer with exactly 122 integers with common factors below it, making 122 a noncototient. 122 is a semiprime. φ(122) = φ(σ(122)). [1]

  3. Skew binary number system - Wikipedia

    en.wikipedia.org/wiki/Skew_binary_number_system

    Each digit has a value of 0, 1, or 2. A number can have many skew binary representations. For example, a decimal number 15 can be written as 1000, 201 and 122. Each number can be written uniquely in skew binary canonical form where there is only at most one instance of the digit 2, which must be the least significant nonzero digit. In this case ...

  4. Binary number - Wikipedia

    en.wikipedia.org/wiki/Binary_number

    The base-2 numeral system is a positional notation with a radix of 2.Each digit is referred to as a bit, or binary digit.Because of its straightforward implementation in digital electronic circuitry using logic gates, the binary system is used by almost all modern computers and computer-based devices, as a preferred system of use, over various other human techniques of communication, because ...

  5. Binary distribution - Wikipedia

    en.wikipedia.org/wiki/Binary_distribution

    Download as PDF; Printable version; In other projects Wikidata item; ... Binary distribution is the presence of two or more very large and dominant cities in a ...

  6. Binary data - Wikipedia

    en.wikipedia.org/wiki/Binary_data

    In applied computer science and in the information technology field, the term binary data is often specifically opposed to text-based data, referring to any sort of data that cannot be interpreted as text. The "text" vs. "binary" distinction can sometimes refer to the semantic content of a file (e.g. a written document vs. a digital image).

  7. Dasymetric map - Wikipedia

    en.wikipedia.org/wiki/Dasymetric_map

    The simplest and most common technique is the binary method, using regions that are known to be uninhabited, such as water bodies and government-owned land, and cropping these regions out of the choropleth districts, so that they appear empty on the final map. If the variable being mapped is area-dependent (such as population density), the ...

  8. Binary classification - Wikipedia

    en.wikipedia.org/wiki/Binary_classification

    Binary classification is the task of classifying the elements of a set into one of two groups (each called class). Typical binary classification problems include: Medical testing to determine if a patient has a certain disease or not; Quality control in industry, deciding whether a specification has been met;

  9. GIS file format - Wikipedia

    en.wikipedia.org/wiki/GIS_file_format

    A GIS file format is a standard for encoding geographical information into a computer file, as a specialized type of file format for use in geographic information systems (GIS) and other geospatial applications.