February 20, 1910
Budapest, Kingdom of Hungary
|Died||August 28, 2005
|Known for||Happy ending problem|
Esther Klein was born to Ignaz Klein in a Jewish family in Budapest, Kingdom of Hungary in 1910. As a young woman in Budapest, Klein was a member of a group of Hungarians including Paul Erdős, George Szekeres and Pál Turán that convened over interesting mathematical problems.
Following the outbreak of World War II, Esther and George Szekeres emigrated to Australia after spending several years in Hongkew, a community of refugees located in Shanghai, China. In Australia, they originally settled in Adelaide before moving to Sydney in the 1960s.
In Sydney, Esther lectured at Macquarie University and was actively involved in mathematics enrichment for high-school students. In 1984, she jointly founded a weekly mathematics enrichment meeting that has since expanded into a programme of about 30 groups that continue to meet weekly and inspire high school students throughout Australia and New Zealand.
- "Erdős 1". The Erdös Number Project Data Files. Oakland University. 2010-10-20. Retrieved 2014-07-21.
- O'Connor, J J; Robertson, E F (2006). "George Szekeres". The MacTutor History of Mathematics archive. University of St Andrews. Retrieved 2012-08-11.
- Cowling, Michael (2005-11-07). "A world of teaching and numbers - times two". The Sydney Morning Herald. Retrieved 2012-08-11.
- "Shanghai, a city for Jews in China". The Menorah of Fang Bang Lu. Archived from the original on 2010-08-13. Retrieved 2005-08-30.
- Taylor, Peter (2005-12). "Szekeres Obituary". Australian Mathematics Trust. Retrieved 2012-08-11. Check date values in: