◀ ▲ ▶History / 19thcentury / Person: Petersen, Julius Peter Christian
Person: Petersen, Julius Peter Christian
Julius Petersen was a Danish mathematician who worked on geometry and graph theory. He is best remembered for the Petersen graph.
Mathematical Profile (Excerpt):
 Julius first attended a private school in Soro then, in 1849, he entered Soro Academy School.
 Most of the pupils at the school were boarders but the school also admitted some day pupils like Julius who lived in the town.
 He was considered a good teacher of mathematics, but school teaching did present a great problem to Petersen for he seemed incapable of controlling the pupils.
 Petersen was awarded his doctorate in 1871.
 Petersen corresponded with Sylow during 187071, mostly about this result.
 His friend and colleague at the University of Copenhagen was Zeuthen who was almost exactly the same age as Petersen.
 Petersen also taught at the Officers School of the Army from 1881 to 1887.
 Petersen was enthusiastic about such matters and joined a committee to support Georg Brandes but this was short lived.
 Petersen joined the National Economic Society and translated an economics text by Henry Fawcett into Danish.
 These days Petersen's theorem is always proven indirectly using major results such as Hall's theorem from 1935 and Tutte's theorem on 1factors from 1947.
 Although the Petersen graph is usually the first time an undergraduate will today come across his name, this does not appear in this 1891 masterpiece.
 It is reasonable to ask why Petersen began working in graph theory.
 the work of Petersen and Zeuthen is regarded as being responsible for the emergence of Danish mathematics on the international scene towards the end of the 19th century.
 In the last part of his career, from 1888 to 1909, Petersen worked on function theory, latin squares, and number theory.
 Petersen contributed to many areas other than mathematics, some of which we have mentioned above.
 Petersen was also a founder member of the Danish Mathematical Society, which came into existence in 1873, and he remained a very active member of the Society.
Born 16 June 1839, Soro, Denmark. Died 5 August 1910, Copenhagen, Denmark.
View full biography at MacTutor
Tags relevant for this person:
Origin Denmark
Thank you to the contributors under CC BYSA 4.0!
 Github:

 nonGithub:
 @JJO'Connor
 @EFRobertson
References
Adapted from other CC BYSA 4.0 Sources:
 Oâ€™Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive