The Man Who Corrected Einstein
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This video is about how Russian physicist Aleksandr Fridman corrected Albert Einstein about the expansion of the universe. Einstein thought that general relativity implied that space had to be static and unchanging, but he had made a technical error regarding the differentiation of the metric (in particular, I believe he mistook the determinant of the metric for a scalar rather than a tensor density of weight 2). Friedmann didn't make this differential geometric mistake, and the cosmologies he found from the Einstein Equations were more varied in their properties - they could be expanding, or contracting, or (with the cosmological constant), static.
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REFERENCES
Alexander Friedmann
https://en.wikipedia.org/wiki/Alexander_Friedmann
Einstein Wrongly Criticizes Alexander Friedmann
https://einsteinpapers.press.princeton.edu/vol13-trans/301
Alexander Friedmann Corrects Einstein
https://einsteinpapers.press.princeton.edu/vol13-trans/363
Einstein Admits his Mathematical Mistake
https://einsteinpapers.press.princeton.edu/vol14-trans/77
Interrogating the Legend of Einstein’s “Biggest Blunder”
https://arxiv.org/abs/1804.06768
Cosmological Considerations in the General Theory of Relativity
https://einsteinpapers.press.princeton.edu/vol6-trans/433
On the General Theory of Relativity (Einstein)
https://einsteinpapers.press.princeton.edu/vol6-trans/110
The Field Equations of Gravitation
https://einsteinpapers.press.princeton.edu/vol6-trans/129
The Einstein Field Equations
https://en.wikipedia.org/wiki/Einstein_field_equations
Presentation about the Sequence of Events
http://web.mit.edu/8.286/www/slides07/Einstein-and-Friedmann.pdf
Tensor Densities:
https://en.wikipedia.org/wiki/Tensor_density
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Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
Created by Henry Reich
Видео The Man Who Corrected Einstein канала minutephysics
This video is about how Russian physicist Aleksandr Fridman corrected Albert Einstein about the expansion of the universe. Einstein thought that general relativity implied that space had to be static and unchanging, but he had made a technical error regarding the differentiation of the metric (in particular, I believe he mistook the determinant of the metric for a scalar rather than a tensor density of weight 2). Friedmann didn't make this differential geometric mistake, and the cosmologies he found from the Einstein Equations were more varied in their properties - they could be expanding, or contracting, or (with the cosmological constant), static.
Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics
Link to Patreon Supporters: http://www.minutephysics.com/supporters/
REFERENCES
Alexander Friedmann
https://en.wikipedia.org/wiki/Alexander_Friedmann
Einstein Wrongly Criticizes Alexander Friedmann
https://einsteinpapers.press.princeton.edu/vol13-trans/301
Alexander Friedmann Corrects Einstein
https://einsteinpapers.press.princeton.edu/vol13-trans/363
Einstein Admits his Mathematical Mistake
https://einsteinpapers.press.princeton.edu/vol14-trans/77
Interrogating the Legend of Einstein’s “Biggest Blunder”
https://arxiv.org/abs/1804.06768
Cosmological Considerations in the General Theory of Relativity
https://einsteinpapers.press.princeton.edu/vol6-trans/433
On the General Theory of Relativity (Einstein)
https://einsteinpapers.press.princeton.edu/vol6-trans/110
The Field Equations of Gravitation
https://einsteinpapers.press.princeton.edu/vol6-trans/129
The Einstein Field Equations
https://en.wikipedia.org/wiki/Einstein_field_equations
Presentation about the Sequence of Events
http://web.mit.edu/8.286/www/slides07/Einstein-and-Friedmann.pdf
Tensor Densities:
https://en.wikipedia.org/wiki/Tensor_density
MinutePhysics is on twitter - @minutephysics
And facebook - http://facebook.com/minutephysics
And Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6
Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
Created by Henry Reich
Видео The Man Who Corrected Einstein канала minutephysics
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