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Isaac Argyros
Isaac Argyros (Greek: Ισαάκιος Αργυρός) was a Byzantine mathematician and monk, born about 1312, who wrote a treatise named ''Easter Rule'', along with books on arithmetic, geometry and astronomy. Works * ''An Easter Rule'', a treatise on Easter * ''New Tables: An Astronomical treatise'', based on Ptolemaic astronomy Bibliography * ''Science and Civilisation in China, Volume 3: Mathematics and the Sciences of the Heavens and the Earth'', Joseph Needham, Cambridge University Press 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 scienti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Empire in the 5th centuryAD, it endured until the fall of Constantinople to the Ottoman Empire in 1453. The term 'Byzantine Empire' was coined only after its demise; its citizens used the term 'Roman Empire' and called themselves 'Romans'. During the early centuries of the Roman Empire, the western provinces were Latinised, but the eastern parts kept their Hellenistic culture. Constantine I () legalised Christianity and moved the capital to Constantinople. Theodosius I () made Christianity the state religion and Greek gradually replaced Latin for official use. The empire adopted a defensive strategy and, throughout its remaining history, experienced recurring cycles of decline and recovery. It reached its greatest extent un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Year Of Death Unknown
A year is a unit of time based on how long it takes the Earth to orbit the Sun. In scientific use, the tropical year (approximately 365 solar days, 5 hours, 48 minutes, 45 seconds) and the sidereal year (about 20 minutes longer) are more exact. The modern calendar year, as reckoned according to the Gregorian calendar, approximates the tropical year by using a system of leap years. The term 'year' is also used to indicate other periods of roughly similar duration, such as the lunar year (a roughly 354-day cycle of twelve of the Moon's phasessee lunar calendar), as well as periods loosely associated with the calendar or astronomical year, such as the seasonal year, the fiscal year, the academic year, etc. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by changes in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar regions around the planet, four seasons ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14th-century Greek Educators
The 14th century lasted from 1 January 1301 (represented by the Roman numerals MCCCI) to 31 December 1400 (MCD). It is estimated that the century witnessed the death of more than 45 million lives from political and natural disasters in both Europe and the Mongol Empire. West Africa experienced economic growth and prosperity. In Europe, the Black Death claimed 25 million lives wiping out one third of the European population while the Kingdom of England and the Kingdom of France fought in the protracted Hundred Years' War after the death of King Charles IV of France led to a claim to the French throne by King Edward III of England. This period is considered the height of chivalry and marks the beginning of strong separate identities for both England and France as well as the foundation of the Italian Renaissance and the Ottoman Empire. In Asia, Tamerlane (Timur), established the Timurid Empire, history's third largest empire to have been ever established by a single conqueror. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14th-century Greek Scientists
The 14th century lasted from 1 January 1301 (represented by the Roman numerals MCCCI) to 31 December 1400 (MCD). It is estimated that the century witnessed the death of more than 45 million lives from political and natural disasters in both Europe and the Mongol Empire. West Africa experienced economic growth and prosperity. In Europe, the Black Death claimed 25 million lives wiping out one third of the European population while the Kingdom of England and the Kingdom of France fought in the protracted Hundred Years' War after the death of King Charles IV of France led to a claim to the French throne by King Edward III of England. This period is considered the height of chivalry and marks the beginning of strong separate identities for both England and France as well as the foundation of the Italian Renaissance and the Ottoman Empire. In Asia, Tamerlane (Timur), established the Timurid Empire, history's third largest empire to have been ever established by a single conqueror. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Byzantine Astronomers
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 Empire in the 5th centuryAD, it endured until the fall of Constantinople to the Ottoman Empire in 1453. The term 'Byzantine Empire' was coined only after its demise; its citizens used the term 'Roman Empire' and called themselves 'Romans'. During the early centuries of the Roman Empire, the western provinces were Latinised, but the eastern parts kept their Hellenistic culture. Constantine I () legalised Christianity and moved the capital to Constantinople. Theodosius I () made Christianity the state religion and Greek gradually replaced Latin for official use. The empire adopted a defensive strategy and, throughout its remaining history, experienced recurring cycles of decline and recovery. It reached its greatest extent unde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14th-century Byzantine Monks
The 14th century lasted from 1 January 1301 (represented by the Roman numerals MCCCI) to 31 December 1400 (MCD). It is estimated that the century witnessed the death of more than 45 million lives from political and natural disasters in both Europe and the Mongol Empire. West Africa experienced economic growth and prosperity. In Europe, the Black Death claimed 25 million lives wiping out one third of the European population while the Kingdom of England and the Kingdom of France fought in the protracted Hundred Years' War after the death of King Charles IV of France led to a claim to the French throne by King Edward III of England. This period is considered the height of chivalry and marks the beginning of strong separate identities for both England and France as well as the foundation of the Italian Renaissance and the Ottoman Empire. In Asia, Tamerlane (Timur), established the Timurid Empire, history's third largest empire to have been ever established by a single conqueror. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argyros Family
Thw House of Argyros (, derived from , "silver"), feminine Argyre (), Latinized as Argyrus and Argyra, was the name of a prominent aristocratic family of Roman Emperors of the Byzantine Empire active from the middle of the 9th century until the very end of the Empire in the 15th century, although it passed its peak after the mid-11th century. The name also evolved the variant forms Argyropoulos () and the feminine Argyropoulina (). The Argyroi apparently originated in the province of Charsianon, where they had large estates. They hence belonged to the Anatolian land-holding military aristocracy (the "''dynatoi''"); indeed, they are among the earliest, and almost archetypal, such families to emerge, along with the Doukai. The family is first securely attested in the mid-9th century, but may have its origins in a certain ''patrikios'' Marianos and his son Eustathios, who was captured by the Umayyads in 740/41 and executed after refusing to convert to Islam. Beginning with the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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, Mathematical model, models, and mathematics#Calculus and analysis, change. History One of the earliest known mathematicians was Thales of Miletus (); he has been hailed as the first true mathematician and the first known individual to whom a mathematical discovery has been attributed. He is credited with the first use of deductive reasoning applied to geometry, by deriving four corollaries to Thales's theorem. The number of known mathematicians grew when Pythagoras of Samos () established the Pythagorean school, whose doctrine it was that mathematics ruled the universe and whose motto was "All is number". It was the Pythagoreans who coined the term "mathematics", and with whom the study of mathematics for its own sake begins. The first woman math ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1312 Births
Year 1312 ( MCCCXII) was a leap year starting on Saturday of the Julian calendar. Events January – March * January 13 – English royal favourite Piers Gaveston, having returned secretly from two months exile on the continent, is reunited, probably at Knaresborough Castle, with King Edward II, who on January 18 restores all Gaveston's confiscated lands to him. They plan to travel to Scotland to seek help from King Robert the Bruce. * February 7 – In Scotland, Dungal MacDouall is forced to surrender Dumfries Castle to the forces of King Robert the Bruce. Despite having helped in the murder of King Robert's brothers in 1308, Dungal is allowed to go into exile rather than being put to death. * February 20 – Öljaitü, the Ikhanate of the Mongol Empire's territory in the Middle East, carries out a purge of corrupt officials, with the arrest and execution of his vizier, Sa'd al-Din Savaji and one of Sa'd al-Din's closest aides, Taj al-Din Avaji, * Februar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
