Friedrich Julius Richelot (6 November 1808 – 31 March 1875) was a German

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, mathematical structure, structure, space, Mathematica ...

, born in

Königsberg Königsberg (, ) was the historic Prussian city that is now Kaliningrad, Russia. Königsberg was founded in 1255 on the site of the ancient Old Prussian settlement ''Twangste'' by the Teutonic Knights during the Northern Crusades, and was na ...

. He was a student of

Carl Gustav Jacob Jacobi Carl Gustav Jacob Jacobi (; ; 10 December 1804 – 18 February 1851) was a German mathematician who made fundamental contributions to elliptic functions, dynamics, differential equations, determinants, and number theory. His name is occasio ...

. He was promoted in 1831 at the Philosophical Faculty of the

University of Königsberg The University of Königsberg (german: Albertus-Universität Königsberg) was the university of Königsberg in East Prussia. It was founded in 1544 as the world's second Protestant academy (after the University of Marburg) by Duke Albert of Pruss ...

with a dissertation on the division of the circle into 257 equal parts (see references) and was a professor there. Richelot authored numerous publications in German, French and

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power ...

, among them — with his 1832 dissertation — the first known guide to the Euclidean construction of the regular 257-gon with

compass and straightedge In geometry, straightedge-and-compass construction – also known as ruler-and-compass construction, Euclidean construction, or classical construction – is the construction of lengths, angles, and other geometric figures using only an ideali ...

. In 1825 he joined the Corps Masovia.Kösener Korps-Listen 1910, 141, 8 He died in Königsberg in 1875.

References

Thesis

Friedrich Julius Richelot: ''De resolutione algebraica aequationis ''x''²⁵⁷ = 1, sive de divisione circuli per bisectionem anguli septies repetitam in partes 257 inter se aequales commentatio coronata''
In: ''Journal für die reine und angewandte Mathematik''. Nr. 9, 1832, S. 1–26, 146–161, 209–230, und 337–358. {{DEFAULTSORT:Richelot, Friedrich Julius 19th-century German mathematicians University of Königsberg faculty 1808 births 1875 deaths Scientists from Königsberg

See also

References

Thesis