Tilman Sauer (born 1963) is a German theoretical physicist and historian of the natural sciences. He has an international reputation as an expert on the history of the development of general relativity theory. [1] [2] [3] [4]
At the Free University of Berlin, Sauer received in 1990 his Diplom in theoretical physics and in 1994 his doctorate ( Promotion ) in theoretical physics. His doctoral dissertation is entitled Development and Application of Refined Path Monte Carlo Methods. From 1991 to 1996 he was employed as a research scholar at Berlin's Max Planck Institute for Human Development. In 1996 from March to December he worked at Berlin's Max Planck Institute for the History of Science. From 1997 to 1999 he worked for the project Hilbert-Edition [1] [5] at the University of Göttingen's Institute for the History of Science. From 1999 to 2001 he was an assistant professor (Hochschulassistent) at the University of Bern's Institute for the History of Science, where he eventually completed his habilitation in the history of science in 2008. [1] [6] From December 2008 to September 2015 he was a Privatdozent at the University of Bern. Sauer has held various academic appointments in the history department at Caltech since 2001. For the academic year 2010–2011 at the University of Bern, he held an interim chair (Lehrstuhlvertretung) for the history and philosophy of science. [1] [7] At the University of Mainz, he has been, since 2015, a professor for the history of mathematics and natural sciences. [1]
Sauer has done much research on the history of general relativity (GR) in the scientific work of Albert Einstein and co-edited for the Einstein Papers Project volumes 9 through 14 and also volume 16. He was a contributing editor for volume 4. Specifically, he edited the scientific manuscripts on GR and unified field theory. [4] With Jürgen Renn, Sauer investigated and published Einstein's 1912 Zurich notebook, which is important for the history of the emergence of GR. [8] [9]
Einstein seems to have delayed until 1936 publishing an important idea he had in 1912. Renn and Sauer explicated the role that Rudi W. Mandl played in urging Einstein to publish on gravitational lensing. [10] [11]
Sauer also researched David Hilbert's contributions to the early history of GR and the Hilbert-Einstein priority dispute [12] and Hilbert's program on the foundations of physics. The priority dispute is, among other things, about the question of what is written on a missing page of a page proof of Hilbert's paper — Sauer is of the opinion that the complete Einstein field equations were not found by Hilbert. [13]
Sauer's research also includes, among other topics, the history of Richard Feynman's research and the development of the theory of path integrals. [14] [15]
In 2016 Sauer gave the historical lecture „Ich bewundere die Eleganz Ihrer Rechnungsweise“ - Einstein und die Mathematik (I admire the elegance of your calculations — Einstein and mathematics), which was part of the events accompanying the Euler Lecture. [16]
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: CS1 maint: postscript (link)Albert Einstein was a German-born theoretical physicist who is widely held as one of the most influential scientists. Best known for developing the theory of relativity, Einstein also made important contributions to quantum mechanics. His mass–energy equivalence formula E = mc2, which arises from special relativity, has been called "the world's most famous equation". He received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect", a pivotal step in the development of quantum theory.
General relativity, also known as the general theory of relativity, and as Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics. General relativity generalizes special relativity and refines Newton's law of universal gravitation, providing a unified description of gravity as a geometric property of space and time or four-dimensional spacetime. In particular, the curvature of spacetime is directly related to the energy and momentum of whatever matter and radiation are present. The relation is specified by the Einstein field equations, a system of second order partial differential equations.
A gravitational lens is matter, such as a cluster of galaxies or a point particle, that bends light from a distant source as it travels toward an observer. The amount of gravitational lensing is described by Albert Einstein's general theory of relativity. If light is treated as corpuscles travelling at the speed of light, Newtonian physics also predicts the bending of light, but only half of that predicted by general relativity.
An Einstein ring, also known as an Einstein–Chwolson ring or Chwolson ring, is created when light from a galaxy or star passes by a massive object en route to the Earth. Due to gravitational lensing, the light is diverted, making it seem to come from different places. If source, lens, and observer are all in perfect alignment (syzygy), the light appears as a ring.
In theoretical physics, the Einstein–Cartan theory, also known as the Einstein–Cartan–Sciama–Kibble theory, is a classical theory of gravitation, one of several alternatives to general relativity. The theory was first proposed by Élie Cartan in 1922.
Marcel Grossmann was a Swiss mathematician who was a friend and classmate of Albert Einstein. Grossmann came from an old Swiss family in Zürich. His father managed a textile factory. He became a Professor of Mathematics at the Federal Polytechnic School in Zürich, today the ETH Zurich, specializing in descriptive geometry.
General relativity is a theory of gravitation developed by Albert Einstein between 1907 and 1915. The theory of general relativity says that the observed gravitational effect between masses results from their warping of spacetime.
General relativity is a theory of gravitation that was developed by Albert Einstein between 1907 and 1915, with contributions by many others after 1915. According to general relativity, the observed gravitational attraction between masses results from the warping of space and time by those masses.
Orest Danilovich Khvolson or Chwolson was a Russian and later Soviet physicist and honorary member of the Soviet Academy of Sciences (1920). He is most noted for being one of the first to study the gravitational lens effect.
Banesh Hoffmann was a British mathematician and physicist known for his association with Albert Einstein.
Albert Einstein presented the theories of special relativity and general relativity in publications that either contained no formal references to previous literature, or referred only to a small number of his predecessors for fundamental results on which he based his theories, most notably to the work of Henri Poincaré and Hendrik Lorentz for special relativity, and to the work of David Hilbert, Carl F. Gauss, Bernhard Riemann, and Ernst Mach for general relativity. Subsequently, claims have been put forward about both theories, asserting that they were formulated, either wholly or in part, by others before Einstein. At issue is the extent to which Einstein and various other individuals should be credited for the formulation of these theories, based on priority considerations.
Friedwardt Winterberg is a German-American theoretical physicist and was a research professor at the University of Nevada, Reno. He is known for his research in areas spanning general relativity, Planck scale physics, nuclear fusion, and plasmas. His work in nuclear rocket propulsion earned him the 1979 Hermann Oberth Gold Medal of the Wernher von Braun International Space Flight Foundation and a 1981 citation by the Nevada Legislature. He is also an honorary member of the German Aerospace Society Lilienthal-Oberth.
The Einstein radius is the radius of an Einstein ring, and is a characteristic angle for gravitational lensing in general, as typical distances between images in gravitational lensing are of the order of the Einstein radius.
John Stachel is an American physicist and philosopher of science.
Jürgen Ehlers was a German physicist who contributed to the understanding of Albert Einstein's theory of general relativity. From graduate and postgraduate work in Pascual Jordan's relativity research group at Hamburg University, he held various posts as a lecturer and, later, as a professor before joining the Max Planck Institute for Astrophysics in Munich as a director. In 1995, he became the founding director of the newly created Max Planck Institute for Gravitational Physics in Potsdam, Germany.
Hans-Jürgen Treder was a German theoretical physicist and in the GDR, specializing in general relativity, astrophysics, and cosmology. He also had an interest in the history of science and philosophy.
Jürgen Renn is a German historian of science, and since 1994 Director at the Max Planck Institute for the History of Science in Berlin.
Leo Corry is an Israeli historian of mathematics.
Albert Einstein's discovery of the gravitational field equations of general relativity and David Hilbert's almost simultaneous derivation of the theory using an elegant variational principle, during a period when the two corresponded frequently, has led to numerous historical analyses of their interaction. The analyses came to be called a priority dispute.
The Meaning of Relativity: Four Lectures Delivered at Princeton University, May 1921 is a book published by Princeton University Press in 1922 that compiled the 1921 Stafford Little Lectures at Princeton University, given by Albert Einstein. The lectures were translated into English by Edwin Plimpton Adams. The lectures and the subsequent book were Einstein's last attempt to provide a comprehensive overview of his theory of relativity and is his only book that provides an accessible overview of the physics and mathematics of general relativity. Einstein explained his goal in the preface of the book's German edition by stating he "wanted to summarize the principal thoughts and mathematical methods of relativity theory" and that his "principal aim was to let the fundamentals in the entire train of thought of the theory emerge clearly". Among other reviews, the lectures were the subject of the 2017 book The Formative Years of Relativity: The History and Meaning of Einstein's Princeton Lectures by Hanoch Gutfreund and Jürgen Renn.
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: CS1 maint: postscript (link) preprint, translated into German in Renn, J.; Sauer, T. (2005). "Im Rampenlicht der Sterne. Einstein, Mandl und die Ursprünge der Gravitationslinsenforschung; Im Rampenlicht dedddddddddr Sterne. Einstein, Mandl und die Ursprünge der Gravitationslinsenforschung". Acta Historica Astronomiae. 27: 210–239. Bibcode:2005AcHA...27..210R.