#mathematical_notation  a notation used by mathematicians
  supertype:  #notation__notational_system  a technical system of symbols used to represent special things
  part of:  #mathematical_statement
  subtype:  #numeration_system__number_system__number_representation_system__system_of_numeration  any notation for the representation of numbers
     subtype:  #positional_notation__positional_representation_system  a numeration system in which a real number is represented by an ordered set of characters where the value of a character depends on its position
        subtype:  #pure_binary_numeration_system__binary_numeration_system__binary_number_system__binary_system  a positional system of numeration that uses binary digits and a radix of 2
        subtype:  #octal_numeration_system__octal_number_system  a positional system of numeration that uses octal digits and a radix of 8
        subtype:  #decimal_numeration_system__decimal_number_system__decimal_system__decimalsystem  a positional system of numeration that uses decimal digits and a base of 10
           subtype:  #algorism.decimal_numeration_system  the Arabic (or decimal) system of numeration
        subtype:  #hexadecimal_number_system__sexadecimal_number_system__hexadecimal_system__hexadecimalsystem  a positional system of numeration that uses hexadecimal digits and a radix of 16
  subtype:  #binary_notation  any notation that uses 2 characters (usually 0 and 1)
  subtype:  #decimal_notation__decimalnotation  any notation that uses 10 different characters (usually the digits 0 to 9)
  subtype:  #octal_notation__octalnotation  any mathematical notation that uses 8 different characters (usually the digits 0 to 7)
  subtype:  #hexadecimal_notation__hexadecimalnotation__sexadecimal_notation__sexadecimalnotation  any notation that uses 16 different characters
  subtype:  #sign.mathematical_notation  a character indicating a relation between quantities; "don't forget the minus sign"
     subtype:  #equals_sign  a sign indicating that the quantities on either side are equal
     subtype:  #plus_sign  a sign indicating the operation of addition
     subtype:  #minus_sign__minussign  a sign indicating the operation of subtraction
  subtype:  #decimal_point__decimalpoint__percentage_point  the dot at the left of a decimal fraction
  subtype:  #exponent.mathematical_notation__power__index  a mathematical notation indicating the number of times a quantity is multiplied by itself
     subtype:  #degree.exponent  the highest power of a term or variable
        subtype:  #degree_of_a_term  the sum of the exponents of the variables in the term
        subtype:  #degree_of_a_polynomial  the degree of the term in the polynomial that has the highest degree
     subtype:  #logarithm__log  the exponent required to produce a given number
        subtype:  #common_logarithm  a logarithm to the base 10
        subtype:  #natural_logarithm__naturallogarithm__Napierian_logarithm  a logarithm to the base e
  subtype:  #radical_sign__radicalsign__radical  a sign placed in front of an expression to denote that a root is to be extracted
  subtype:  #fixed-point_notation__fixedpointnotation__fixed-point_representation_system  a radix numeration system in which the location of the decimal point is fixed by convention
  subtype:  #floating-point_notation__floating-point_representation_system  a radix numeration system in which the location of the decimal point is indicated by an exponent of the radix; the floating-point representation of 0.0012 is 0.12-2 where -2 is the exponent
  subtype:  #infix_notation__infixnotation  a notation for forming mathematical expressions using parentheses and governed by rules of operator precedence; operators are dispersed among the operands
  subtype:  #parenthesis-free_notation  a notation for forming mathematical expressions that does not use parentheses to delimit components
     subtype:  #prefix_notation__Lukasiewicz_notation__Polish_notation  a parenthesis-free notation for forming mathematical expressions in which each operator precedes its operands
     subtype:  #postfix_notation__postfixnotation__suffix_notation__reverse_Polish_notation  a parenthesis-free notation for forming mathematical expressions in which each operator follows its operands

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