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Якоби, Карл Густав Якоб

Дата рождения: 10. Декабрь 1804
Дата смерти: 18. Февраль 1851
Другие имена:Karl Gustav Jacob Jacobi

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Карл Гу́став Я́коб Яко́би — немецкий математик и механик. Внёс огромный вклад в комплексный анализ, линейную алгебру, динамику и другие разделы математики и механики. Родной брат российского академика, физика Бориса Семёновича Якоби.

Член Берлинской академии наук , Лондонского королевского общества , член-корреспондент Парижской академии наук , иностранный член-корреспондент Петербургской Академии наук , член Венской и член-корреспондент Мадридской академии .

Цитаты Якоби, Карл Густав Якоб

„It is true that M. Fourier had the opinion that the principal end of mathematics was the public utility and the explanation of natural phenomena; but such a philosopher as he is should have known that the unique end of science is the honor of the human mind, and that from this point of view a question of number is as important as a question of the system of the world.“

— Carl Gustav Jacob Jacobi
Letter to Legendre (July 2, 1830) in response to Fourier's report to the Paris Academy Science that mathematics should be applied to the natural sciences, as quoted in Science (March 10, 1911) [https://books.google.com/books?id=4LU7AQAAMAAJ&pg=PA359 Vol. 33], p.359, with additional citations and dates from H. Pieper, "Carl Gustav Jacob Jacobi," Mathematics in Berlin (2012) p.46

„History knew a midnight, which we may estimate at about the year 1000 A. D., when the human race lost the arts and sciences even to the memory. The last twilight of paganism was gone, and yet the new day had not begun. Whatever was left of culture in the world was found only in the Saracens, and a Pope eager to learn studied in disguise in their unversities, and so became the wonder of the West. At last Christendom, tired of praying to the dead bones of the martyrs, flocked to the tomb of the Saviour Himself, only to find for a second time that the grave was empty and that Christ was risen from the dead. Then mankind too rose from the dead. It returned to the activities and the business of life; there was a feverish revival in the arts and in the crafts. The cities flourished, a new citizenry was founded. Cimabue rediscovered the extinct art of painting; Dante, that of poetry. Then it was, also, that great courageous spirits like Abelard and Saint Thomas Aquinas dared to introduce into Catholicism the concepts of Aristotelian logic, and thus founded scholastic philosophy. But when the Church took the sciences under her wing, she demanded that the forms in which they moved be subjected to the same unconditioned faith in authority as were her own laws. And so it happened that scholasticism, far from freeing the human spirit, enchained it for many centuries to come, until the very possibility of free scientific research came to be doubted. At last, however, here too daylight broke, and mankind, reassured, determined to take advantage of its gifts and to create a knowledge of nature based on independent thought. The dawn of the day in history is know as the Renaissance or the Revival of Learning.“

— Carl Gustav Jacob Jacobi
"Über Descartes Leben und seine Methode die Vernunft Richtig zu Leiten und die Wahrheit in den Wissenschaften zu Suchen," "About Descartes' Life and Method of Reason.." (Jan 3, 1846) C. G. J. Jacobi's Gesammelte werke [https://books.google.com/books?id=_09tAAAAMAAJ&pg=PA309 Vol. 7] p.309, as quoted by Tobias Dantzig, Number: The Language of Science (1930).

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„Any progress in the theory of partial differential equations must also bring about a progress in Mechanics.“

— Carl Gustav Jacob Jacobi
[http://archive.org/details/cgjjacobisvorle00lottgoog Vorlesungen über Dynamik] [Lectures on Dynamics] (1842/3; publ. 1884).

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