Person MacMahon; Percy Alexander (1854 - 1929); mathematician MacMahon Percy Alexander mathematician 1854 - 1929 British Male Malta 26 September 1854 18540926 Springfield, Normanton Avenue, Bognor Regis, Sussex 25/12/1929 19291225

Woolwich (1889); 27 Evelyn Mansions, Carlisle Place, Westminster, London (1907)

Mathematician Mathematics Astronomy Education: Proprietary School, Cheltenham; Cheltenham College; Royal Military Academy, Woolwich Career: Joined the Royal Artillery (1872); retired as Major; served in India; returned to England; Instructor in Mathematics, Woolwich (1882); Professor of Physics, Ordnance College (1890); retired from the army (1898 ); Deputy Warden of the Standards, Board of Trade (1904-1920); member of Governing Body, Winchester College (1899-1924) Memberships: FRAS (President); Mathematical Society (President); RSA Medals/awards: Mrgan Medal (1923) Parents: Colonel Patrick William MacMahon and his wife, Ellen, daughter of George Savage Curtis, of Teignmouth. Spouse: Grace Elizabeth, daughter of C. R. Howard, of 32 Gloucester Place, London (9 February 1907) MacMahon made a remarkable entrance into the mathematical scene by establishing a direct correlation between invariant theory and the theory of partitions, a branch of number theory. Arthur Cayley lauded MacMahon's discovery as 'very remarkable,' solidifying his mathematical standing. In the subsequent years, Cayley sought MacMahon's assistance in tackling complex problems in invariant theory. Specialising in the theory of algebraic forms, MacMahon produced numerous results, including his noteworthy master theorem, a method for analysing permutations using determinants. Royal Society roles: VP 1916-1917 Medals and prizes: Royal Medal 1900; Sylvester Medal 1919 Fellow 05/06/1890 36 Alexander John Ellis; John Henry Lefroy; James Thomas Walker; Arthur Cayley; James Joseph Sylvester; Percival Frost; Algred George Greenhill; James Whitbread Lee Glaisher; Andrew Russell Forsyth; James Cockle; John James Walker; Morgan William Crofton Sources: Bulloch's Roll; DSB; DNB Obituaries: Proc Roy Soc Series A 1930 vol 127 pp x-xvii, plate International Standard Archival Authority Record for Corporate Bodies, Persons and Families - ISAAR(CPF) - Ottawa 1996 ISBN 0-9696035-3-3 National Council on Archives, Rules for the Construction of Personal, Place and Corporate Names, 1997 https://royalsocietypublishing.org/action/doSearch?ContribAuthorRaw=MacMahon%2C+Percy+Alexander RCN 13342 RCN 13343 RCN 12900 RCN 22625 https://pictures.royalsociety.org/results?mi_search_type=adv&mi_adv_search=yes&adv_person_id=AUTH5448 26 Sep 1854 - 25 Dec 1929 The past Fellows entries are under continuous revision. If you have queries or additional information to contribute, please contact Library@royalsociety.org. Content in external sources is not controlled by the Royal Society and historical sources may include content that is now unacceptable. Reviewed on 27/02/2024 as part of the Name Authority Project update. NA6982 21/11/2001 Andyg Pmab 27/02/2024 RS_NET\VidaM Yes http://viaf.org/viaf/59163712 bbd00091-d416-4503-a54a-6319741f9b60