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Aleksandr Mikhailovich Lyapunov [a] [b] (Алекса́ндр Миха́йлович Ляпуно́в, 6 June [O.S. 25 May] 1857 – 3 November 1918) was a Russian mathematician, mechanician and physicist.
Alexander Alexandrovich Friedmann (also spelled Friedman or Fridman; He was a Russian and Soviet physicist and mathematician. He originated the pioneering theory that the universe is expanding, governed by a set of equations he developed known as the Friedmann equations.
The following is a list of people who are considered a "father" or "mother" (or "founding father" or "founding mother") of a scientific field.Such people are generally regarded to have made the first significant contributions to and/or delineation of that field; they may also be seen as "a" rather than "the" father or mother of the field.
Alexander Lyapunov: 1892 His paper Sur le problème général de la stabilité du mouvement (in French) marks the beginning of stability theory. James Clerk Maxwell: 1868 Paper "On governors" investigated the stability of governors in a systematic way and discovered the necessary conditions for stability. Nicolas Minorsky: 1922
The Lyapunov time mirrors the limits of the predictability of the system. By convention, it is defined as the time for the distance between nearby trajectories of the system to increase by a factor of e. However, measures in terms of 2-foldings and 10-foldings are sometimes found, since they correspond to the loss of one bit of information or ...
The Lyapunov family (Russian: Ляпуно́в) is a Russian noble family claiming descent from the Galich Rurikids, who lost their princely title in the 15th century. [ note 1 ] [ 1 ] : 276–277 The family later served the archbishop of Veliky Novgorod , and subsequently integrated into the Ryazanian nobility .
Russia is demanding the United Nations condemn Kyiv following an alleged drone attack that it claims killed a journalist working for a Russian outlet and injured several others.. Russia’s ...
The same underlying mathematics, however, was also discovered independently several times: by George William Hill (1877), [16] Gaston Floquet (1883), [17] and Alexander Lyapunov (1892). [18] As a result, a variety of nomenclatures are common: applied to ordinary differential equations , it is called Floquet theory (or occasionally the Lyapunov ...