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Esther Szekeres ((ハンガリー語:Klein Eszter); 20 February 191028 August 2005) was a Hungarian–Australian mathematician. ==Biography== 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.〔 In 1933, Klein proposed to the group a combinatorial problem that Erdős named as the Happy Ending problem as it led to her marriage to George Szekeres in 1937, with whom she had two children.〔 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.〔 In 2004, she and George moved back to Adelaide, where, on 28 August 2005, she and her husband died within an hour of each other.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Esther Szekeres」の詳細全文を読む スポンサード リンク
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