Albert Einstein failed at his protest regarding the unified
field theory and never completed his final few equations.
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No he is known for General relativity, Special relativity,
Photoelectric effect, Brownian motion, Mass-energy equivalence ,
Einstein field equations,Unified Field Theory, Bose-Einstein
statistics
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He was known for:
General relativity
Special relativity
Brownian motion
Photoelectric effect
Mass-energy equivalence
Einstein field equations
Unified Field Theory
Bose-Einstein statistics
EPR paradox
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A first rank tensor is called a vector.
A massless spin-2 field would be indistinguishable from, or it
would describe gravity, if its equations of motions are the
Einstein field equations.