In approximately the year 1240, the French monk Alexandre de Ville Dei (or Villedieu) wrote *Carmen de Algorism* (*Song of Algorism*), a didactical poem, written in Latin hexameter rhyme, concerning the integers and their operations (or *species*). The pages shown here are from a Spanish manuscript of the *Algorism,* dated between 1300 and 1350. The opening lines on the first page (above) are as follows (Swetz 1987, p. 28):

Here begins the algorismus.

This new art is called the algorismus, in

Which out of these twice fine figures

0 9 8 7 6 5 4 3 2 1

of the Indians we derive such benefit ...

While a brief tract, the *Algorismus* is the first work (after Fibonacci's *Liber Abaci* in 1202 and 1228) to introduce the symbol “0” for zero into the Latin literature. The author also erroneously attributed the symbols to an Indian ruler “Algor.” Thus were coined the terms: “algorismus” and “algorism.” These terms are now known to derive from the name of Al-Khwarizmi, the 9th century pioneer of algebra based in Baghdad (Swetz 1987, pp. 27-29). Mathematics historian and educator, David Eugene Smith, speaking of Europe, supported his contention that the *Carmen de Algorism* "probably did more to make known the Hindu-Arabic numerals than any other work of the [13th] century" (1958, p. 226) by noting the large number of copies that remained in European academic libraries in the early 20th century (1912, p. 57).

The first page (or folio), reverse side (or verso), of the *Algorism* follows:

The second page (or folio), front side (or recto), of the *Carmen de Algorism* is shown below.

*The images above of the *Carmen de Algorism* were obtained through the courtesy of the University of California Libraries. A complete digital copy of this item can be viewed on the Libraries’ Internet Archive.*

### References

Frank Swetz, *Capitalism & Arithmetic: The New Math of the 15*^{th} Century. Chicago: Open Court Publishing, 1987. (The pages cited in this article are accessible via Google Books.)

David Eugene Smith, *History of Mathematics,* Vol. 1, Courier, 1958 (originally published by Ginn & Co., 1953), accessed via Google Books.

David Eugene Smith, "Number Games and Number Rhymes, Chapter V: The Origin and Development of the Number Rhyme," *Teachers College Record *(ed. James Earl Russell), Vol. 13, No. 5 (November 1912), Teachers College, Columbia University, pp. 53-62, accessed via Google Books.

Index to Mathematical Treasures