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Code of the Quipu is a book on the Inca system of recording numbers and other information by means of a quipu, a system of knotted strings.It was written by mathematician Marcia Ascher and anthropologist Robert Ascher, and published as Code of the Quipu: A Study in Media, Mathematics, and Culture by the University of Michigan Press in 1981.
With her husband, Ascher co-authored the book Code of the Quipu: A Study in Media, Mathematics, and Culture (University of Michigan Press, 1981); it was republished in 1997 by Dover Books as Mathematics of the Incas: Code of the Quipu. [6]
Representation of a quipu, an Inca accounting and mnemonic instrument. The prevailing numeral system was the base-ten. [2] One of the main references confirming this are the chronicles that present a hierarchy of organized authorities, using the decimal numeral system with its arithmometer: Quipu.
The word Quipu is derived from a Quechua word meaning 'knot' or 'to knot'. [16] The terms quipu and khipu are simply spelling variations on the same word.Quipu is the traditional spelling based on the Spanish orthography, while khipu reflects the recent Quechuan and Aymaran spelling shift.
Locke's most prominent work, The Ancient Quipu or Peruvian Knot Record (1923), demonstrated how the Inca tied knots on quipu cords using a base-10 positional number system. [2] In addition to his work on quipus , Locke is also recognized for his research on the history of mathematics [ 3 ] and mathematical instruments, particularly his research ...
A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.
Chinese knots come in a variety of shapes and sizes. They are made from a single cord and are often double-layered and symmetrical in all directions. [3] [4] [5] Satin cording is the most widely used material, especially when the knotting is done for clothing and jewellery; however, cotton, parachute cord, and other materials are frequently used as well.
Urton is a specialist in Andean archaeology, particularly the quipu (khipu) rope-based recording system used in the Inca empire in the 15th and 16th centuries. He is one of the most prominent advocates of the theory that the quipus encode linguistic as well as numerical information. [ 5 ]