By Eduard A. Tropp, Viktor Ya. Frenkel, Artur D. Chernin, Alexander Dron, Michael Burov
Our universe should be defined mathematically by means of an easy version built in 1922 at Petrograd (St. Petersburg) by way of Alexander Friedmann (1888-1925). with out the good thing about observational proof, Friedmann envisioned that the entire universe could extend and evolve with time. This spectacular prediction used to be proven seven years later by way of Edwin Hubble. Its originator, regrettably did not reside to appreciate this triumph. This shiny biography of an exceptional scientist units his existence and paintings opposed to a large backdrop of the heritage of cosmological reports and its significant gamers, reminiscent of Einstein and others. The ebook is a window on Friedmann's university and college years, army carrier, and instructing and examine in the course of a seminal interval of Soviet heritage. The authors comprise precise archival fabric, equivalent to Friedmann's letters from the Russian entrance, in addition to modern files and recollections of peers. there's a designated remedy of his paintings in theoretical cosmology (1922-1924), set within the context of the association of Soviet technology on the time.
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Additional resources for Alexander A Friedmann: The Man who Made the Universe Expand
A. Steklov, another strong influence on Friedmann was Pavel Sigizmundovich Ehrenfest, whose name is very much part of the development of theoretical physics in Russia in the pre-revolutionary and early post-revolutionary years. At the end of 1907 or the very beginning 1908, the many societies active at the University and other higher and secondary educational establishments in St. Petersburg were supplemented by a "kruschok" whose work was supervised by P. S. Ehrenfest. We deliberately wrote the Russian word "kruzhok" (a hobby group, a society) in German - the way Ehrenfest wrote it, for Russian was not his native language.
Ivanov (compiled jointly with Tamarkin). It cannot be that he did not take part in publishing Steklov's courses, particularly his "Partial Differential Equations," reprinted by the PC many times. As to Ehrenfest, he may have been involved in editing some courses, and there must have been some misunderstanding over his pay for the work, which was taken by Friedmann so close to heart. Dear Pavel Sigizmundovich, Excuse me for troubling you with my small request. You may know what 7 The Minutes of the Sessions of the Council of St.
Ehrenfest highly valued, of course, the ability of his colleagues to capture the main points in the work reviewed and to present them clearly to others. But he encouraged the participants in the seminar not to worry if they failed to understand certain (usually very complicated) questions, but to emphasize these problems and to clarify them through free discussion at the circle's sessions. " The surprised Ehrenfest objected: "What do you mean, unless you have questions? " Unfortunately, we do not know the exact titles of the papers presented by Friedmann in Ehrenfest's circle, but we know that he became very 4 These letters were made available to us through the courtesy of Dr.