George David Birkhoff1923
George David Birkhoff proves that the Schwarzschild spacetime geometry is the unique spherically symmetric solution of the Einstein vacuum field equations
United States of America · Science / Astronomy. Chronological records rendered directly from the World History Database.
George David Birkhoff proves that the Schwarzschild spacetime geometry is the unique spherically symmetric solution of the Einstein vacuum field equations
Andrew Strominger and Cumrun Vafa use string theory to calculate the entropy of a black hole, getting the same answer as Hawking and Bekenstein
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