Marino Ghetaldi (; ; 2 October 1568 – 11 April 1626) was a Ragusan scientist. A

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

physicist A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate cau ...

who studied in

Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

and

Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...

, his best results are mainly in

physics Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge whi ...

, especially

optics Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of optical instruments, instruments that use or Photodetector, detect it. Optics usually describes t ...

, and

mathematics Mathematics is a field of study that discovers and organizes methods, Mathematical theory, theories and theorems that are developed and Mathematical proof, proved for the needs of empirical sciences and mathematics itself. There are many ar ...

. He was one of the few students of

François Viète François Viète (; 1540 – 23 February 1603), known in Latin as Franciscus Vieta, was a French people, French mathematician whose work on new algebra was an important step towards modern algebra, due to his innovative use of letters as par ...

and friend of Giovanni Camillo Glorioso.

Biography

Born into the Ghetaldi noble family, he was one of six children. He was known for the application of algebra in geometry and his research in the field of geometrical optics on which he wrote 7 works including the ''Promotus Archimedus'' (1603) and the ''De resolutione et compositione mathematica'' (1630). He also produced a leaflet with the solutions of 42 geometrical problems, , in 1607 and set grounds of algebraization of

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 ...

. His contributions to geometry had been cited by Dutch

Christiaan Huygens Christiaan Huygens, Halen, Lord of Zeelhem, ( , ; ; also spelled Huyghens; ; 14 April 1629 – 8 July 1695) was a Dutch mathematician, physicist, engineer, astronomer, and inventor who is regarded as a key figure in the Scientific Revolution ...

and

Edmond Halley Edmond (or Edmund) Halley (; – ) was an English astronomer, mathematician and physicist. He was the second Astronomer Royal in Britain, succeeding John Flamsteed in 1720. From an observatory he constructed on Saint Helena in 1676–77, Hal ...

, who calculated the orbit of what is known as

Halley's comet Halley's Comet is the only known List of periodic comets, short-period comet that is consistently visible to the naked eye from Earth, appearing every 72–80 years, though with the majority of recorded apparitions (25 of 30) occurring after ...

, in England. Ghetaldi was the constructor of the parabolic mirror (66 cm in diameter), kept today at the

National Maritime Museum The National Maritime Museum (NMM) is a maritime museum in Greenwich, London. It is part of Royal Museums Greenwich, a network of museums in the Maritime Greenwich World Heritage Site. Like other publicly funded national museums in the Unit ...

London London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...

. He was also a pioneer in making conic lenses. During his sojourn in

Padua Padua ( ) is a city and ''comune'' (municipality) in Veneto, northern Italy, and the capital of the province of Padua. The city lies on the banks of the river Bacchiglione, west of Venice and southeast of Vicenza, and has a population of 20 ...

he met

Galileo Galilei Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642), commonly referred to as Galileo Galilei ( , , ) or mononymously as Galileo, was an Italian astronomer, physicist and engineer, sometimes described as a poly ...

, with whom he corresponded regularly. He was a good friend to the French mathematician

. He was offered the post of

professor Professor (commonly abbreviated as Prof.) is an Academy, academic rank at university, universities and other tertiary education, post-secondary education and research institutions in most countries. Literally, ''professor'' derives from Latin ...

of mathematics at

Old University of Leuven The Old University of Leuven (or of Louvain) is the name historians give to the Medieval university, university, or ''studium generale'', founded in Leuven, Duchy of Brabant, Brabant (then part of the Burgundian Netherlands, now part of Belgium ...

, at the time one of the most prestigious university centers in

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

. He was also engaged in politics and was the envoy of the

Republic of Ragusa The Republic of Ragusa, or the Republic of Dubrovnik, was an maritime republics, aristocratic maritime republic centered on the city of Dubrovnik (''Ragusa'' in Italian and Latin; ''Raguxa'' in Venetian) in South Dalmatia (today in southernmost ...

Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...

in 1606 as well as a member of the Great and Small Council, the political bodies of the Republic. He was married to Marija Sorkočević, who died giving birth to their third daughter; they had three daughters: Anica, Franica, and Marija.

Works

* *

Legacy

Two notable localities in

Dubrovnik Dubrovnik, historically known as Ragusa, is a city in southern Dalmatia, Croatia, by the Adriatic Sea. It is one of the most prominent tourist destinations in the Mediterranean Sea, Mediterranean, a Port, seaport and the centre of the Dubrovni ...

are associated with the name of Getaldić: Bete's Cave, named after Marino's nickname, where he conducted experiments with igniting mirrors; and Pozvizd, a key strategic tower in the

Ston Ston () is a settlement and a municipality in the Dubrovnik-Neretva County of Croatia, located at the south of isthmus of the Pelješac peninsula. History Because of its geopolitical and strategic position, Ston has had a rich history since ...

fortification system which he was commissioned to build by the authorities of the Republic of Dubrovnik in 1604.

References

Sources

Bibliography

*A. Favaro, "Marino Ghetaldi," Amici e corrisponsdenti di Galileo, 3 vols. (Firenze, 1983), 2, 911-34. *H. Wieleitner, "Marino Ghetaldi und die Anfänge der Koordinatengeometrie," Bibliotheca mathematica, 3rd ser., 13, pp. 242–247. *G. Barbieri, "Marino Ghetaldi," in Pietro F. Martecchini, Galleria di Ragusei illustri, (Ragusa, 1840).

External links

* * * {{DEFAULTSORT:Getaldic, Marin Croatian physicists Croatian mathematicians People from the Republic of Ragusa 1568 births 1626 deaths 16th-century mathematicians 17th-century mathematicians Ragusan diplomats People from Dubrovnik Ragusan nobility