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  2. Mixed radix - Wikipedia

    en.wikipedia.org/wiki/Mixed_radix

    Mixed-radix representation is also relevant to mixed-radix versions of the Cooley–Tukey FFT algorithm, in which the indices of the input values are expanded in a mixed-radix representation, the indices of the output values are expanded in a corresponding mixed-radix representation with the order of the bases and digits reversed, and each ...

  3. Liber Abaci - Wikipedia

    en.wikipedia.org/wiki/Liber_Abaci

    For instance, 1/3+1/4 = 7/12, so a notation like would represent the number that would now more commonly be written as the mixed number , or simply the improper fraction . Notation of this form can be distinguished from sequences of numerators and denominators sharing a fraction bar by the visible break in the bar.

  4. Factorial number system - Wikipedia

    en.wikipedia.org/wiki/Factorial_number_system

    General mixed radix systems were studied by Georg Cantor. [2] The term "factorial number system" is used by Knuth, [3] while the French equivalent "numération factorielle" was first used in 1888. [4] The term "factoradic", which is a portmanteau of factorial and mixed radix, appears to be of more recent date. [5]

  5. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    More general is using a mixed radix notation (here written little-endian) like for + +, etc. This is used in Punycode , one aspect of which is the representation of a sequence of non-negative integers of arbitrary size in the form of a sequence without delimiters, of "digits" from a collection of 36: a–z and 0–9, representing 0–25 and 26 ...

  6. Radix - Wikipedia

    en.wikipedia.org/wiki/Radix

    In a positional numeral system, the radix (pl.: radices) or base is the number of unique digits, including the digit zero, used to represent numbers.For example, for the decimal system (the most common system in use today) the radix is ten, because it uses the ten digits from 0 through 9.

  7. Permutation - Wikipedia

    en.wikipedia.org/wiki/Permutation

    Converting successive natural numbers to the factorial number system produces those sequences in lexicographic order (as is the case with any mixed radix number system), and further converting them to permutations preserves the lexicographic ordering, provided the Lehmer code interpretation is used (using inversion tables, one gets a different ...

  8. Up tack - Wikipedia

    en.wikipedia.org/wiki/Up_tack

    Perpendicularity of lines in geometry; Orthogonality in linear algebra; Independence of random variables in probability theory; Coprimality in number theory; The double tack up symbol (тлл, U+2AEB in Unicode [1]) is a binary relation symbol used to represent: Conditional independence of random variables in probability theory [2]

  9. History of ancient numeral systems - Wikipedia

    en.wikipedia.org/wiki/History_of_ancient_numeral...

    Sexagesimal numerals were a mixed radix system that retained the alternating bases of 10 and 6 that characterized tokens, numerical impressions, and proto-cuneiform numerical signs. Sexagesimal numerals were used in commerce, as well as for astronomical and other calculations.

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