It was invented by Eric Hehner of the University of Toronto, and published in the SIAM Journal on Computation, v.8, n.2, May 1979, pp.
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The construction of this system follows the approach of Kurt Hensel's p-adic numbers.
Big O notation | Z notation | Reverse Polish notation | Whyte notation | Parts-per notation | The final form of Braille's alphabet, according to Henri (1952). The decade diacritics are listed at left, and the supplementary letters are assigned to the appropriate decade at right. Characters are derived by combining the diacritic on the left with the basic letters at top. "(1)" indicates markers for musical and mathematical notation. Parentheses and quotation marks follow English Braille | that book's notation | Siegbahn notation | scientific pitch notation | Reverse Polish Notation | reverse Polish notation | Quote Unquote Records | Quote... Unquote | quote notation | Quote (magazine) | Quote | Portable Game Notation | Isoroku Yamamoto's sleeping giant quote | Infix notation | Financial quote | abuse of notation | Abstract Syntax Notation One | ABC notation |
In 1979, Hehner invented a method of representing rational numbers with current University of Victoria professor Nigel Horspool called quote notation, which allows for easier arithmetic and produces no roundoff error in arithmetic calculations implementing a generalization of radix notation.