Niels Henrik Abel (August 5, 1802–April 6, 1829), Norwegian mathematician, was born in Finnøy. In 1815 he entered the cathedral school at Christiania (as Oslo was then called), and three years later he gave proof of his mathematical genius by his brilliant solutions of the original problems proposed by Bernt Holmboe . About this time, his father, a poor Protestant minister, died, and the family was left in straitened circumstances; but a small pension from the state allowed Abel to enter Christiania University in 1821.
Abel's first notable work was a proof of the impossibility of solving the quintic equation by radicals (see AbelRuffini theorem.) This investigation was first published in 1824 in abstruse and difficult form, and afterwards (1826) more elaborately in the first volume of Crelle's Journal. Further state sponsorship enabled him to visit Germany and France in 1825, and having visited the astronomer Schumacher (1780–1850) in Altona near Hamburg he spent six months in Berlin, where he became well acquainted with August Leopold Crelle, who was then about to publish his mathematical journal. This project was warmly encouraged by Abel, who contributed much to the success of the venture. From Berlin he passed to Freiberg, and here he made his brilliant researches in the theory of functions: elliptic, hyperelliptic, and a new class now known as abelian functions being particularly intensely studied.
In 1826 Abel moved to Paris, and during a ten month stay he met the leading mathematicians of France; but he was poorly appreciated, as his work was scarcely known, and his modesty restrained him from proclaiming his researchings. Pecuniary embarrassments, from which he had never been free, finally compelled him to abandon his tour, and on his return to Norway he taught for some time at Christiania. In early April 1829 Crelle obtained a post for him in Berlin, but the letter bringing the offer did not reach Norway until two days after Abel's death from tuberculosis at Froland Ironworks near Arendal.
The early death of this talented mathematician, of whom Legendre said "quelle tête celle du jeune Norvégien !" ("what a head the young Norwegian has!"), cut short a career of extraordinary brilliance and promise. Under Abel's guidance, the prevailing obscurities of analysis began to be cleared, new fields were entered upon and the study of functions so advanced as to provide mathematicians with numerous ramifications along which progress could be made. His works, the greater part of which originally appeared in Crelle's Journal, were edited by Holmboe and published in 1839 by the Swedish government, and a more complete edition by Ludwig Sylow and Sophus Lie was published in 1881. The adjective "abelian", derived from his name, has become so commonplace in mathematical writing that it is conventionally spelled with a lowercase initial "a" (see abelian group and abelian category; also abelian variety and Abel transform).
In 2002, the Abel Prize was established in his honour.
Trivia

April 6, 1929 — Four Norwegian stamps issued for the centenary of his death.

June 5, 2002 — Four Norwegian stamps issued in honour of Abel two months before the bicentenary of his birth.
There is a statue of Abel in Oslo. He is believed to be the only mathematician to have been portrayed in the nude.
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