1820 - 1891
John Casey (mathematician) British Scientist, Scientist
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John Casey (mathematician) is a member of the following lists: Fellows of the Royal Society, People from County Kilkenny and 1820 births.
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Details
| First Name |
John
|
| Last Name |
Casey
|
| Birthday |
12th May, 1820
|
| Birthplace |
Kilbehenny, County Limerick, Ireland
|
| Died |
3rd January, 1891
|
| Place of Death |
Dublin
|
| Zodiac Sign |
Taurus
|
| Nationality |
British
|
| Occupation Text |
geometer, teacher
|
| Occupation |
Scientist, Scientist
|
John Casey (12 May 1820, Kilbehenny, County Limerick, Ireland – 3 January 1891, Dublin) was a respected Irish geometer. He is most famous for Casey's theorem on a circle that is tangent to four other circles, an extension of Ptolemy's theorem. However, he contributed several novel proofs and perspectives on Euclidean geometry. He and Émile Lemoine are considered to be the co-founders of the modern geometry of the circle and the triangle.
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