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= Ólafur Daníelsson = Ólafur Dan Daníelsson (31 October 1877 to 10 December 1957) was a Icelandic mathematician. He is known for being the first Icelandic person to be awarded a doctorate in mathematics and for his influence on the education of mathematics in Iceland.

Biography
Daníelsson was born on the 31 October 1887, in Skagafjörður, Iceland. He completed his initial schooling in Laerða School in Reykjavík in 1897 before studying mathematics in the University of Copenhagen. He was awarded his master's degree in 1904, and after an unsuccessful application to work as a teacher in his old school earned money by giving private tuition; at the same time researching for his doctorate, and was awarded it after submitting his thesis in 1909. Daníelsson was the first person in Iceland to be awarded a doctorate in mathematics. While tutoring, Daníelsson published a book about arithmetic titled Reikningsbók, and republished it in 1914.

His thesis was an extension of earlier works by Hieronymus Georg Zeuthen and well known scientists at the time.