Isaac Argyros (Greek: Ισαάκιος Αργυρός) was a

Byzantine The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived the events that caused the fall of the Western Roman E ...

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, mathematical structure, structure, space, Mathematica ...

and monk, born about 1312, who wrote a treatise named ''Easter Rule'', along with books on

arithmetic Arithmetic is an elementary branch of mathematics that deals with numerical operations like addition, subtraction, multiplication, and division. In a wider sense, it also includes exponentiation, extraction of roots, and taking logarithms. ...

geometry Geometry (; ) is a branch of mathematics concerned with properties of space such as the distance, shape, size, and relative position of figures. Geometry is, along with arithmetic, one of the oldest branches of mathematics. A mathematician w ...

and

astronomy Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...

Works

* ''An Easter Rule'', a treatise on

Easter Easter, also called Pascha ( Aramaic: פַּסְחָא , ''paskha''; Greek: πάσχα, ''páskha'') or Resurrection Sunday, is a Christian festival and cultural holiday commemorating the resurrection of Jesus from the dead, described in t ...

* ''New Tables: An Astronomical treatise'', based on

Ptolemaic astronomy In astronomy, the geocentric model (also known as geocentrism, often exemplified specifically by the Ptolemaic system) is a superseded description of the Universe with Earth at the center. Under most geocentric models, the Sun, Moon, stars, a ...

Bibliography

* ''Science and Civilisation in China, Volume 3: Mathematics and the Sciences of the Heavens and the Earth'', Joseph Needham,

Cambridge University Press Cambridge University Press was the university press of the University of Cambridge. Granted a letters patent by King Henry VIII in 1534, it was the oldest university press in the world. Cambridge University Press merged with Cambridge Assessme ...

1959,

References

1312 births

Isaac Isaac ( ; ; ; ; ; ) is one of the three patriarchs (Bible), patriarchs of the Israelites and an important figure in the Abrahamic religions, including Judaism, Christianity, Islam, and the Baháʼí Faith. Isaac first appears in the Torah, in wh ...

Year of death unknown 14th-century Byzantine writers 14th-century astronomers 14th-century Byzantine scientists 14th-century Byzantine monks Byzantine astronomers 14th-century Greek scientists 14th-century Greek educators 14th-century Greek mathematicians 14th-century Greek astronomers {{Byzantine-bio-stub