Johannes Acronius Frisius

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Johannes Acronius (or Atrocianus) Frisius (1520 18 October 1564) was a Dutch doctor and mathematician of the 16th century.

Netherlands Constituent country of the Kingdom of the Netherlands in Europe

The Netherlands, informally Holland, is a country in Northwestern Europe with some overseas territories in the Caribbean. In Europe, it consists of 12 provinces that border Germany to the east, Belgium to the south, and the North Sea to the northwest, with maritime borders in the North Sea with those countries and the United Kingdom. Together with three island territories in the Caribbean Sea—Bonaire, Sint Eustatius and Saba—it forms a constituent country of the Kingdom of the Netherlands. The official language is Dutch, but a secondary official language in the province of Friesland is West Frisian. In the northern parts of the country, Low German is also spoken.

Physician professional who practices medicine

A physician, medical practitioner, medical doctor, or simply doctor, is a professional who practises medicine, which is concerned with promoting, maintaining, or restoring health through the study, diagnosis, prognosis and treatment of disease, injury, and other physical and mental impairments. Physicians may focus their practice on certain disease categories, types of patients, and methods of treatment—known as specialities—or they may assume responsibility for the provision of continuing and comprehensive medical care to individuals, families, and communities—known as general practice. Medical practice properly requires both a detailed knowledge of the academic disciplines, such as anatomy and physiology, underlying diseases and their treatment—the science of medicine—and also a decent competence in its applied practice—the art or craft of medicine.

Mathematician person with an extensive knowledge of mathematics

A mathematician is someone who uses an extensive knowledge of mathematics in his or her work, typically to solve mathematical problems.

He was named after his city of birth, Akkrum in Friesland. From 1547 he worked as professor of mathematics in Basel, then after 1549 as professor of logic, and in 1564 of medicine. He died from the plague in the same year. Apart from mathematical and scientific works, he wrote Latin poetry and humanist tracts.

Akkrum Village in Friesland, Netherlands

Akkrum is a village in the Dutch province of Friesland. It is located in the municipality Heerenveen, about 17 km south of the city of Leeuwarden.

Friesland Province of the Netherlands

Friesland, historically known as Frisia, is a province of the Netherlands located in the northern part of the country. It is situated west of Groningen, northwest of Drenthe and Overijssel, north of Flevoland, northeast of North Holland, and south of the Wadden Sea. In 2019, the province had a population of 647,672 and a total area of 5,749 km2 (2,220 sq mi).

Professor academic title at universities and other post-secondary education and research institutions in most countries

Professor is an academic rank at universities and other post-secondary education and research institutions in most countries. Literally, professor derives from Latin as a "person who professes" being usually an expert in arts or sciences, a teacher of the highest rank.


An aphorism is a concise, terse, laconic, and/or memorable expression of a general truth or principle. They are often handed down by tradition from generation to generation. The concept is distinct from those of an adage, brocard, chiasmus, epigram, maxim, principle, proverb, and saying; some of these concepts are species of aphorism.

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