The Hauksbók is one of the few medieval Norse manuscripts of which the author is known. His name was Haukr Erlendsson

Haukr Erlendsson

Haukr Erlendsson was the writer of the Hauksbók.In 1294, he became the lawspeaker of Iceland and in 1301 he arrived in Norway, where, according to a letter from 1311, he is called the lawspeaker and knight of the Gula Thing. He appears to have held this position until 1322....

 (?-1334), and as long back as it is possible to trace the manuscript it has been called the Hauksbók after its author. It was partly written by Haukr himself, partly by assistants. The book contains versions, sometimes the only extant versions, of many Old Icelandic texts, such as the Landnámabók

Landnámabók

Landnámabók , often shortened to Landnáma, is a medieval Icelandic written work describing in considerable detail the settlement of Iceland by the Norse in the 9th and 10th centuries AD.-Landnáma:...

, the Fóstbrœðra saga

Fóstbrœðra saga

Fóstbrœðra saga or The Saga of the Sworn Brothers is one of the Icelanders' sagas. It relates the deeds of the sworn brothers Þorgeirr and Þormóðr in early 11th century Iceland and abroad....

, the Eiríks saga rauða, the Hervarar saga

Hervarar saga

Hervarar saga ok Heiðreks is a legendary saga from the 13th century combining matter from several older sagas. It is a valuable saga for several different reasons beside its literary qualities. It contains traditions of wars between Goths and Huns, from the 4th century, and the last part is used as...

and the Völuspá

Völuspá

Völuspá is the first and best known poem of the Poetic Edda. It tells the story of the creation of the world and its coming end related by a völva addressing Odin...

.

Palaeographical evidence allowed Stefán Karlsson to date the manuscript to between 1302 and 1310 ("Aldur Hauksbókar", 'Fróðskaparrit', 13 (1964), 114–21).

The book contains a section on mathematics

Mathematics

Mathematics is the study of quantity, space, structure, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conjectures by mathematical proofs, which are arguments sufficient to convince other mathematicians of their validity...

 of ca. 6-7 A4

ISO 216

ISO 216 specifies international standard paper sizes used in most countries in the world today. It defines the "A" and "B" series of paper sizes, including A4, the most commonly available size...

 pages, called Algorismus. This is the oldest text on mathematics in a Scandinavian language. It is probably a translation from Latin into Scandinavian of some pages included in more ancient books such as Carmen de Algorismo by De Villa Dei of 1200, Liber Abaci

Liber Abaci

Liber Abaci is a historic book on arithmetic by Leonardo of Pisa, known later by his nickname Fibonacci...

by Fibonacci

Fibonacci

Leonardo Pisano Bigollo also known as Leonardo of Pisa, Leonardo Pisano, Leonardo Bonacci, Leonardo Fibonacci, or, most commonly, simply Fibonacci, was an Italian mathematician, considered by some "the most talented western mathematician of the Middle Ages."Fibonacci is best known to the modern...

 of 1202, and Algorismus Vulgaris by De Sacrobosco

Johannes de Sacrobosco

Johannes de Sacrobosco or Sacro Bosco was a scholar, monk, and astronomer who taught at the University of Paris and wrote the authoritative mediaeval astronomy text Tractatus de Sphaera.-Origins:Although described as English, his birthplace is unknown because Sacrobosco is...

of 1230.