My friend and former colleague Ilse Ryder, who has died aged 94, fled to the UK from Czechoslovakia just before the second world war and later became a maths teacher in the London area, working in that role until her retirement in the early 1990s.
Ilse was born in Brüx in Czechoslovakia, the only child of Ernst Stein, a lawyer, and his wife, Elise (nee Grunfeld), a mathematician. Her parents separated when she was seven, after which she moved to Vienna with her mother and then to Prague in 1938.
