Ian R. Porteous uses the three direct sums above, denoting them
In 1995 Ian R. Porteous wrote on "The recognition of subalgebras" in his book on Clifford algebras.
Ian Fleming | Ian McKellen | Ian Smith | Ian Rankin | Ian Brown | Ian Botham | Ian Thorpe | Ian McEwan | Ian Paisley | Ian Kershaw | Ian Bremmer | Ian Roberts | Ian Ogilvy | Ian McShane | Ian MacKaye | Ian Holm | Ian Carmichael | Ian Richardson | Ian La Frenais | Ian Gillan | Ian Dury | Ian Bannen | Janis Ian | Ian Roberts (actor) | Ian McNeice | Ian Edginton | Ian Anderson | Ian Pooley | Ian Page | Ian O'Brien |
Ian R. Johnston (born 1949), Australian human factors engineer and road safety advocate
Ian R. MacLeod (born 1956), British science fiction and fantasy author
The winning stories, brought together in this anthology alongside work from established authors Ian R. MacLeod, Rhys Hughes and John Saul, celebrate the endless possibilities that can derive from a single book.