Alexei Krylov

Alexei Krylov

Infobox Person
name = Alexey Krylov


caption = Alexey Krylov in the 1910s
birth_date = birth date|1863|8|3|mf=y O.S. (August 15 1863 N.S.)
birth_place = Simbirsk Gubernia, Russia
death_date = death date and age|1945|10|26|1863|8|3|mf=y
death_place = Saint Petersburg, Russia

Alexei Nikolaevich Krylov ( _ru. Алексей Николаевич Крылов) (OldStyleDate|August 15|1863|3 August - October 26 1945) was a Russian Naval engineer, applied mathematician and memoirist.

Biography

Alexei Nikolaevich Krylov was born on August 3 O.S., 1863 to the family of an Army Artillery officer in a village of the Simbirsk Gubernia in Russia. Nikolay Krylov's parents were rather poor, but he received a free education as the son of an army veteran.

Krylov entered a "Naval College" (Морское училище) in 1878 and finished with distinction in 1884. There he did his first scientific work with Ivan de Collong about Deviation of magnetic compasses. The theory of magnetic and gyro-compasses fascinated him all his life; he later published important works related to the dynamics of the magnetic compass and proposed the dromoscope, a device that would automatically calculate the deviation of a compass. He also was a pioneer of the gyrocompass, being the first to create a full theory of it.

After spending several years at the "Main Hydrographic Administration" and at a shipbuilding plant ("French-Russian shipbuilding company"), in 1888 he continued his study in the Naval Academy of Saint Petersburg. He was a talented and promising student and after graduating ahead-of-schedule from the Academy in 1890, stayed on as Mathematics and Ship-theory lecturer.

Fame came to him in the 1890s, when his pioneering "Theory of oscillating motions of the ship", significantly extending William Froude's rolling theory, became internationally known. This was the first comprehensive theoretical study in the field. In 1898 Krylov received a Gold Medal from the Royal Institution of Naval Architects, the first time the prize was awarded to a foreigner. He also created a theory of damping of ship rolling and pitching, and the was first to propose gyroscopic damping which now is the most common way of damping the roll.

After 1900 Krylov actively collaborated with Stepan Makarov, admiral and maritime scientist, working on the ship floodability problem. The results of this work soon became classic and are used today worldwide. Years later, Krylov wrote about of the early ideas of Makarov to fight the heel of a sinking ship by flooding its undamaged compartments: "This appeared to be such a great nonsense [to the naval officials] that it took 35 years… to convince [them] that the ideas of the 22-year-old Makarov are of great practical value".

Krylov was well known for his sharp tongue and quick wits. His put downs to government and Duma officials were legendary. As a capable naval consultant, he claimed that his advice saved the government more than the cost of a dreadnaught.

In 1917 he became CEO of "Russian society for shipbuilding and trade" (Русское общество параходостроительства и торговли). After the October Revolution he transferred all his ships to Soviet government and continued to work for the Russian Navy. In 1921 he went to London to re-establish scientific contacts, working there as a representative of Soviet government. In 1927 he returned to the Soviet Union.

Krylov wrote about 300 papers and books. They span a wide range of topics, including shipbuilding, magnetism, artillery, mathematics, astronomy, and geodesy. His floodability tables have been used worldwide. Of note are his works in hydrodynamics including theory of ships moving in shallow water (he was the first to explain and calculate the significant increase of hydrodynamic resistance in shallow water) and the theory of solitons. In 1904 he built the first machine in Russia for integrating ODEs.

In 1931 he published a paper on what is now called the Krylov subspace and Krylov subspace methods. [A. N. Krylov, "On the numerical solution of the equation by which in technical questions frequencies of small oscillations of material systems are determined" , Izvestiya Akademii Nauk SSSR, Otdelenie Matematicheskikh i Estestvennykh Nauk 7:4 (1931), pp. 491-539 (in Russian).] The paper deals with eigenvalue problems, namely, with computation of the characteristic polynomial coefficients of a given matrix. Krylov was concerned with efficient computations and, as a real computational scientist, he counts the work as number of separate numerical multiplications—something not very typical for a 1931 mathematical paper. Krylov begins with a careful comparison of the existing methods that include the worst-case-scenario estimate of the computational work in the Jacobi method. Later, he presents his own method which is superior to the known methods of that time and is still widely used.

Krylov also published the first Russian translation of Isaac Newton, "Philosophiæ Naturalis Principia Mathematica" (1915).

Alexei Nikolaevich Krylov died in Saint Petersburg (by that time Leningrad) on October 26, 1945, shortly after the end of the World War II. He is buried in the Volkovo cemetery, not far from the physiologist Ivan Pavlov and the chemist Dmitri Mendeleev. He was awarded the USSR State Prize (1941), three Orders of Lenin, Hero of Socialist Labor (1943), and was an academician of the Russian Academy of Sciences (after 1916). The Krylov crater on the Moon is named after him.

In one of his autobiographical papers, Krylov describes his activity as 'shipbuilding, i.e. application of Mathematics to various Maritime problems.'

Family

Krylov married his second cousin Elisaveta Dmitrievna Dranitsyna. His daughter Anna married famous physicist Pyotr Kapitsa. Alexei Krylov was very close to his son-in-law.

References

See also

*Froude–Krylov force

External links

* [http://www.math.uu.nl/people/vorst/kryl.html Mike Botchev "Short biography of A.N. Krylov"]
* [http://vivovoco.rsl.ru/VV/PAPERS/BIO/KRYLOV/KRYLOV_00.HTM Krylov's site] - ru icon
* [http://www.ksri.ru/ Krylov Shipbuilding Research Institute official site] - ru icon/en icon


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Alexeï Krylov — Pour les articles homonymes, voir Krylov. Alexeï Krylov Naissance 15 août 1863 …   Wikipédia en Français

  • Krylov — ( ru. Крылов) (masculine or Krylova (feminine) is a common Russian last name. Alternative spellings are Krilov, Kryloff, Kriloff (masculine) and Krilova (feminine; Крылова).This last name is shared by the following people:*Alexei Krylov, a… …   Wikipedia

  • Alexei Alexandrovich de Rusia — Gran Duque Alexei (Alejo) Alexandrovich. Nacido en San Petersburgo el 14 de enero de 1850 y fallecido en París el 14 de noviembre de 1908. Fue el sexto hijo y el cuarto varón del zar Alejandro II de Rusia y de la zarina María Alexandrovna (María… …   Wikipedia Español

  • Krylov —  Cette page d’homonymie répertorie des personnes (réelles ou fictives) partageant un même patronyme. Patronymes Krylov (masculin ; Крылов) ou Krylova (féminin ; Крылова) est un patronyme russe porté par plusieurs personnalités (par …   Wikipédia en Français

  • Krylov subspace — In linear algebra the Krylov subspace generated by an n by n matrix, A , and an n vector, b , is the subspace mathcal{K} n spanned by the vectors of the Krylov sequence:::mathcal{K} n = operatorname{span} , { b, Ab, A^2b, ldots, A^{n 1}b }. , It… …   Wikipedia

  • Krylov — Krylow ist der Name folgender Personen: Alexei Nikolajewitsch Krylow (1863–1945), russischer Mathematiker Iwan Andrejewitsch Krylow (1769–1844), russischer Fabeldichter Juri Nikolajewitsch Krylow (1930–1979), sowjetischer Eishockeyspieler Nikolai …   Deutsch Wikipedia

  • Krylov-Unterraum-Verfahren — Krylow Unterraum Verfahren sind iterative Verfahren zum Lösen großer, dünnbesetzter linearer Gleichungssysteme, wie sie bei der Diskretisierung von partiellen Differentialgleichungen entstehen oder von Eigenwertproblemen. Sie sind benannt nach… …   Deutsch Wikipedia

  • Krylov-Unterraumverfahren — Krylow Unterraum Verfahren sind iterative Verfahren zum Lösen großer, dünnbesetzter linearer Gleichungssysteme, wie sie bei der Diskretisierung von partiellen Differentialgleichungen entstehen oder von Eigenwertproblemen. Sie sind benannt nach… …   Deutsch Wikipedia

  • Krylov-Zerlegung — In der numerischen Mathematik ist eine Krylow Zerlegung (nach Alexei Nikolajewitsch Krylow) eine Matrixgleichung der folgenden Gestalt: wobei eine quadratische Matrix ist, als Spalten die Basisvektoren eines Krylowraumes enthält und …   Deutsch Wikipedia

  • Froude–Krylov force — In fluid dynamics, the Froude–Krylov force sometimes also called the Froude–Kriloff force is a hydrodynamical force named after William Froude and Alexei Krylov. The Froude–Krylov force is the force introduced by the unsteady pressure field… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”