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John Kells Ingram | |
|---|---|
| Born | 7 July 1823 |
| Died | 1 May 1907 (aged 83) |
| Nationality | Irish |
| Occupation(s) | mathematician, economist, poet, polymath |
John Kells Ingram (7 July 1823 – 1 May 1907) was an Irish mathematician, economist and poet who started his career as a mathematician. He has been co-credited, along with John William Stubbs, with introducing the geometric concept of inversion in a circle.[1][2]
- ^ Properties of the cardioide have been obtained by the method of inversion by JK Ingram and JW Stubbs, Dublin Phil Soc Trans I, 1842-43.
- ^ Curves and Their Properties by Robert C. Yates, National Council of Teachers of Mathematics, Inc., Washington, D.C., p. 127: "Geometrical inversion seems to be due to Jakob Steiner who indicated a knowledge of the subject in 1824. He was closely followed by Adolphe Quetelet (1825) who gave some examples. Apparently independently discovered by Giusto Bellavitis in 1836, by Stubbs and Ingram in 1842-3, and by Lord Kelvin in 1845.)"