The Man Who Corrected Einstein

The Man Who Corrected Einstein with tags physics, minutephysics, science

Sign up for Brilliant FOR FREE at http://brilliant.org/minutephysics - the first 200 people get 20% of a premium subscription.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/minutephysicsLink to Patreon Supporters: http://www.minutephysics.com/supporters/REFERENCESAlexander Friedmannhttps://en.wikipedia.org/wiki/Alexander_FriedmannEinstein Wrongly Criticizes Alexander Friedmannhttps://einsteinpapers.press.princeton.edu/vol13-trans/301Alexander Friedmann Corrects Einsteinhttps://einsteinpapers.press.princeton.edu/vol13-trans/363Einstein Admits his Mathematical Mistakehttps://einsteinpapers.press.princeton.edu/vol14-trans/77Interrogating the Legend of Einsteins Biggest Blunderhttps://arxiv.org/abs/1804.06768Cosmological Considerations in the General Theory of Relativityhttps://einsteinpapers.press.princeton.edu/vol6-trans/433On the General Theory of Relativity (Einstein)https://einsteinpapers.press.princeton.edu/vol6-trans/110The Field Equations of Gravitationhttps://einsteinpapers.press.princeton.edu/vol6-trans/129The Einstein Field Equationshttps://en.wikipedia.org/wiki/Einstein_field_equationsPresentation about the Sequence of Eventshttp://web.mit.edu/8.286/www/slides07/Einstein-and-Friedmann.pdfTensor Densities:https://en.wikipedia.org/wiki/Tensor_densityMinutePhysics is on twitter - @minutephysicsAnd facebook - http://facebook.com/minutephysicsAnd Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!Created by Henry Reich