Oppenheim was born on 4 February 1903 in Salford.[1][2] His first language was Yiddish.[2] He grew up in Manchester and attended Manchester Grammar School, where he was recognised as a mathematical prodigy.[1][2] His teachers considered him too young to attend university and delayed his entrance to scholarship competitions until 1921, when he received a scholarship to Balliol College, Oxford.[1][2] In each of his three undergraduate years at the University of Oxford, Oppenheim was the Oxford University mathematical scholar.[2] He also captained the university chess team.[1][2] He graduated with first-class honours in 1924 and was the senior mathematical scholar in 1926.[1][2]
He was awarded a Commonwealth Fellowship to study at Princeton University and the University of Chicago.[1][2] He completed a PhD at the University of Chicago in 1930 under the supervision L.E. Dickson with a thesis titled Minima of Indefinite Quadratic Quaternary Forms, published in the 1920 Proceedings of National Academies of Sciences.[1][2][3] Oppenheim received a second doctorate, a DSc, from the University of Oxford in 1954 for his academic work later in his career.[1][2]
At Changi Camp, Oppenheim helped establish a rudimentary "POW University" with 29 other captured academics and was elected Dean by his fellow prisoners.[1][2] They had persuaded camp commandant[4] Lieutenant Okazaki to allow them to collect books from Raffles College, hold courses in a dozen classrooms, and organize discussion groups.[1][2]
Oppenheim's health deteriorated while at Changi Camp and was frequently seriously ill.[1][2] His involvement at the informal university was interrupted when he was transferred to work on the Siam–Burma Railway.[1][2]
University administration and later life
From 1945 to 1949, he resumed his position as a Professor in Mathematics at Raffles College.[2] In 1947, he was the deputy principal, acting principal, and Dean of the Faculty of Arts.[1][2] Oppenheim played a key role in the 1949 merger of Raffles College with King Edward VII College of Medicine to form the University of Malaya.[1][2] He was appointed acting Vice-Chancellor in 1955 and then Vice-Chancellor in 1957, and remained in that position until his retirement in 1965.[1][2] During his time as Vice-Chancellor, he oversaw the establishment of the new Kuala Lumpur campus of the university.[2]
He lived in Henley-on-Thames until his death there on 13 December 1997 at the age of 94.[1][2]
Research
Oppenheim's most important works were in the theory of quadratic forms.[2] In 1929, he proposed the Oppenheim conjecture about representations of numbers by real quadratic forms in several variables.[5]
Personal life
Oppenheim married Beatrice Templer Nesbit (d. 1990) in 1930.[1][2] They had one daughter and dissolved their marriage in 1977.[1][2] In 1982, he married Margaret Ng, with whom he had two sons.[1][2]
^Sweeting, A. J. (1957). "Chapter 23: Changi, Bicycle Camp, and other Main Centres". In Long, Gavin; Wigmore, Lionel (eds.). The Japanese Thrust. Australia in the War of 1939–1945: Series One: Army. Vol. IV. Australian War Memorial. p. 522. During this period Colonel Sugita and his Intelligence officers controlled the inhabitants of Changi and the civilian internees in the Changi Gaol, the link between Sugita and the prisoners being Lieutenant Okazaki, the Camp Commandant.
