Charles Jasper Joly (27 June 1864 – 4 January 1906) was an Irish mathematician and astronomer who became Royal Astronomer of Ireland.[1][2] He was an important figure in the study of quaternions.[3]

Life

Joly was born at St Catherine's Rectory, Hop Hill, Tullamore, 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,[4] where he took a fellowship in 1894. He became Andrews Professor of Astronomy at Trinity College.[4]

In 1897, he was appointed Royal Astronomer of Ireland and he took up his new position at Dunsink Observatory. He was secretary of the Royal Irish Academy and a Fellow of the Royal Astronomical Society. He was made a Fellow of the Royal Society in 1904.[1]

In 1900 he went on the RIA/RDS eclipse expedition to Spain and later took part in the British Association visit.[3]

He and his daughter contracted typhoid shortly after his return due to infected milk.[4] He died at his residence in Dunsink, County Dublin, in 1906.[5]

Publications

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

  1. 1 2 "Obituary". New York Times. 5 January 1906.
  2. ↑ "Obituary: Charles Jasper Joly". MNRAS. 66: 177–178. 1906. Bibcode:1906MNRAS..66..177.. doi:10.1093/mnras/66.4.177.
  3. 1 2 O'Connor, J. J.; Robertson, E. F. (June 2021). "Charles Jasper Joly". MacTutor Index.
  4. 1 2 3 Byrne, Patricia. "Joly, Charles Jasper". Dictionary of Irish Biography. Retrieved 17 December 2023.
  5. ↑ Proceedings of the Royal Society of London: Containing papers of Charles Jasper Joly By Royal Society (Great Britain)

Sources

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