Zolotarev, Egor Ivanovich
ZOLOTAREV, EGOR IVANOVICH
Zolotarev was the son of a watchmaker. After graduating in 1863 with a silver medal from the Gymnasium, he enrolled at the Faculty of Physics and Mathematics of St. Petersburg, where he attended the lectures of Chebyshev and his student A. N. Korkin. He graduated with the candidate’s degree in 1867 and the following year became assistant professor there. In 1869 he defended his master’s dissertation, on an indeterminate third-degree equation; his doctoral dissertation (1874) was devoted to the theory of algebraic integers. In 1876 he was appointed professor of mathematics at St. Petersburg and junior assistant of applied mathematics at the St. Petersburg Academy of Sciences.
On two trips abroad Zolotarev attended the lectures of Kummer and Weierstrass, and met with Hermite. He shared his impressions of noted scholars and discussed mathematical problems with Korkin, whose collaborator he subsequently became. Zolotarev died at the age of thirty-one, of blood poisoning, after having fallen under a train.
The most gifted member of the St. Petersburg school of mathematics, Zolotarev produced fundamental works on mathematical analysis and the theory of numbers during his eleven-year career. Independent of Dedekind and Kronecker, he constructed a theory of divisibility for the whole numbers of any field of algebraic numbers, working along the lines developed by Kummer and elaborating the ideas and methods that now comprise the core of local algebra. He operated with the number of the local ring Zp and its full closure in the field Q(θ)and, in essence, brought under examination the semilocal ring Op In modern terminology Zolotarev’s results consisted in proving that (1) the ring Op is a finite type of Zp modulus and (2) Op is a ring of principal ideals. In his local approach to the concept of a number of the field Q(θ)Zolotarev demonstrated demonstrated that the ring O of the whole numbers in is the intersextion ofa all semilocal rings Op wiht the aid of a lemma that is the analog of the theory of expansion into Puiseux series.
Zolotarev employed a theory that he had constructed for determining, with a finite number of operations, the possibility of selecting a number, A, such that the the second-order elliptical differential where R(x) is a fourth degree polynomial with real coefficents, can be integrated in olgarithms. Abel demonstrted that for an affirmative solution it is necessary and sufficient that be expandable into a periodic continous fraction; but because he did not gie an evaluation of the period, his solution was ineffective. Zolotarev provided the required evaluation, applying the equation of the division of elliptic functions.
With Korkin, Zolotarev worked on the problem posed by Hermite of dertermining the minima of positive quadratic forms of n variables having real coefficinents; they gave exhaustive solutions for the cases n=4 and n=5.
Among Zolotarev’s other works are an original proof of the law of quadratic reciprocity, based on the group-theoretic lemma that Frobenius had called “the most interesting,” as well as solutions of difficult individual questions in the theory of the optimal approximation of functions. Thus, Zolotarev found the nth-degree polynomial, the first coefficient of which is equal to unity and the second coefficient of whcih is fixed, that deviates least from zero.
I. Original Works. Zolotarev’s complete writings were published by the V. A. Steklov Institute of Physics and Mathematics as Polnoe sobranie sochineny, 2 vols. (Leningrad, 1931-1932); see esp. II, 72-129; and “Sur la théorie des nombres complexes,” in Journal de mathématiques pures et appliquées, 3rd ser., 6 (1880), 51-84, 129-166.
II. Secondary Literature. On Zolotarev’s life and work, see I. G. Bashmakova, “Obosnovanie teorii delimosti v trudakh E. I. Zolotareva” (“Foundation of Theory of Divisbility in Zolotarev’s Works”) in Istori ko-matematicheskie issledovaniya2 (1949), 231-351; N. G. Chebotarev, “Ob osnovanii teorii idealov po Zolotarevu” (“On the Foundation of the Theory of Ideals According to Zolotarev”) in Uspekhi matematicheskikh nauk,2 no. 6 (1947), 52-67; B. N. Delone, Peterbugskaya shkola teorii chisel (“The St. Petersubug School of the Theory of Numbers” : Moscow-Leningrad, 1947); R. O. Kuzmin, “Zhizn i nauchnaya deyatelnost Egora Ivanovicha Zolotareva” (“Zolotarev’s Life and Scientific Activity”) in Uspekhi matematicheskikh nauck, 2 no. 6 (1947), 21-51; and E. p. Ozhigova, Egor Ivanovich Zolotarev (Moscow-Leningrad, 1966).
I. G. Bashmakova
"Zolotarev, Egor Ivanovich." Complete Dictionary of Scientific Biography. . Encyclopedia.com. (April 22, 2019). https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/zolotarev-egor-ivanovich
"Zolotarev, Egor Ivanovich." Complete Dictionary of Scientific Biography. . Retrieved April 22, 2019 from Encyclopedia.com: https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/zolotarev-egor-ivanovich
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
American Psychological Association
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.