Amateur mathematicians

James Abram Garfield was the 20th president of the United States, serving from March 1881 until his death in September that year after being shot in July. A preacher, lawyer, and Civil War general, Garfield served nine terms in the United States House of Representatives and is the only sitting member of the House to be elected president. Before he ran for president, the Ohio General Assembly had elected him to the U.S. Senate, a position he declined upon becoming president-elect.

English mathematician (1815–1852)

Swiss mathematician (1768-1822)

British writer and biomedical gerontologist

Australian science fiction writer and former computer programmer

author of didactic works on mathematics (1832-1916)

Irish-English mathematician (1860-1940)

Amateur calculator, school owner

British civil servant, mathematician and classicist (1861–1940)

French mathematician (1843–1904)

American amateur mathematician (*1923 – †2017)

mathematician, military officer, physician (1901–1983)

American banker, businessman, investor, and amateur mathematician

Russian chess player (1827–1897)

Irish mathematician

American mathematician (*1946 – †1994)

Australian mathematician and linguist (1912–1992)

British mathematician