Charles Jasper Joly (27 June 1864 – 4 January 1906) was an

Irish Irish may refer to: Common meanings * Someone or something of, from, or related to: ** Ireland, an island situated off the north-western coast of continental Europe ***Éire, Irish language name for the isle ** Northern Ireland, a constituent unit ...

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, structure, space, models, and change. History On ...

and

astronomer An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, moons, comets and galaxies – in either ...

who became

Royal Astronomer of Ireland The Dunsink Observatory is an astronomical observatory established in 1785 in the townland of Dunsink in the outskirts of the city of Dublin, Ireland. Alexander Thom''Irish Almanac and Official Directory''7th ed., 1850 p. 258. Retrieved: 2011-02 ...

.Obituary, New York Times, 5 January 1906

Life

He was born at St Catherine's Rectory, Hop Hill,

Tullamore Tullamore (; ) is the county town of County Offaly in Ireland. It is on the Grand Canal, in the middle of the county, and is the fourth most populous town in the midlands region with 14,607 inhabitants at the 2016 census. The town retained ...

, County Offaly, the eldest of six children of Rev. John Swift Joly (1818-1887) and Elizabeth Slator (1835-1904). He was educated at Galway Grammar School and later at Trinity College

Dublin Dublin (; , or ) is the capital and largest city of Ireland. On a bay at the mouth of the River Liffey, it is in the province of Leinster, bordered on the south by the Dublin Mountains, a part of the Wicklow Mountains range. At the 2016 c ...

, where he took a fellowship in 1894. He became

Andrews Professor of Astronomy The Andrews Professor of Astronomy is a chair in astronomy in Trinity College Dublin was established in 1783 in conjunction with the establishment of Dunsink Observatory. Dunsink was founded in 1785 following a bequest by Provost Francis Andre ...

at Trinity College. In 1897, he was appointed Royal Astronomer of Ireland and he took up his new position at

Dunsink Observatory The Dunsink Observatory is an astronomical observatory established in 1785 in the townland of Dunsink in the outskirts of the city of Dublin, Ireland.Alexander Thom''Irish Almanac and Official Directory''7th ed., 1850 p. 258. Retrieved: 2011-02-2 ...

. He was secretary of the Royal Irish Academy and a Fellow of the

Royal Astronomical Society (Whatever shines should be observed) , predecessor = , successor = , formation = , founder = , extinction = , merger = , merged = , type = NG ...

. He was made a

Fellow of the Royal Society Fellowship of the Royal Society (FRS, ForMemRS and HonFRS) is an award granted by the judges of the Royal Society of London to individuals who have made a "substantial contribution to the improvement of natural knowledge, including mathemat ...

in 1904. He died at his residence in Dunsink,

County Dublin "Action to match our speech" , image_map = Island_of_Ireland_location_map_Dublin.svg , map_alt = map showing County Dublin as a small area of darker green on the east coast within the lighter green background of ...

, in 1906.Proceedings of the Royal Society of London: Containing papers of Charles Jasper Joly
By Royal Society (Great Britain)

Publications

William Rowan Hamilton Sir William Rowan Hamilton LL.D, DCL, MRIA, FRAS (3/4 August 1805 – 2 September 1865) was an Irish mathematician, astronomer, and physicist. He was the Andrews Professor of Astronomy at Trinity College Dublin, and Royal Astronomer of Irela ...

and C.J. Joly: Elements of Quaternions (volume I, 1899)

Longmans, Green & Co Longman, also known as Pearson Longman, is a publishing company founded in London, England, in 1724 and is owned by Pearson PLC. Since 1968, Longman has been used primarily as an imprint by Pearson's Schools business. The Longman brand is also ...

, (volume II, 1901).
Quaternions and Projective Geometry
(1903) '' Philosophical Transactions of the Royal Society of London'' 201:223–327.
''A Manual of Quaternions''
(1905) from

Cornell University Cornell University is a private statutory land-grant research university based in Ithaca, New York. It is a member of the Ivy League. Founded in 1865 by Ezra Cornell and Andrew Dickson White, Cornell was founded with the intention to tea ...

Historical Math Monographs Charles Joly published his articles in Royal Irish Academy journals, generally the ''Transactions'', but as indicated below, in '' Proceedings of the Royal Irish Academy'' in 1897, 98, and 99: * 1892: Theory of linear vector functions. 30:597 to 647. * 1896: Properties of general congruency of curves. 31:363 to 92. * 1897: On the homographic divisions of planes, spheres, and space and on the systems of lines joining corresponding points. '' Proceedings RIA'' 4(4): 515. * 1898: The associative algebra applicable to hyperspace. ''Proceedings R.I.A.'' 5(1):73 to 123. * 1899: Astaties and quaternion functions. ''Proceedings R.I.A.'' 5(3):366. * 1902: Interpretation of a quaternion as a point symbol. 32A: 1 to 16. * 1902: Quaternion arrays. 32:17 to 30. * 1902: Quadratic screw system: a study of a family of quadratic complexes. 32A:155 to 238. * 1902: Geometry of a three-system of screws. 32A:239 to 70.

References

Sources

* G. B. Mathews (1907) "C. J. Joly", ''

Proceedings of the London Mathematical Society The London Mathematical Society (LMS) is one of the United Kingdom's learned societies for mathematics (the others being the Royal Statistical Society (RSS), the Institute of Mathematics and its Applications (IMA), the Edinburgh Mathematical S ...

'' vols 2–4, issue 1, p. 1.

External links

* {{DEFAULTSORT:Joly, Charles Jasper 1864 births 1906 deaths 19th-century Irish mathematicians 20th-century Irish mathematicians Academics of Trinity College Dublin Alumni of Trinity College Dublin Directors of Dunsink Observatory Fellows of the Royal Society Irish astronomers Irish mathematicians People from Tullamore, County Offaly