October 1915. Although David Hilbert published the field equations a few months prior to this date, whether or not both developed them independently is still open for debate.
Einstein published it in the Annalen der Physik, 49, 1916 in Germny
Einstein completed the theory in November 1915 and published it the following Spring.
Einstein...
Albert Einstein
Galileo Galile wrote "the Theory of Relativity", and Einstein wrote the General theory of relativity and the special theory of relativity.
Einstein
There's no such thing as an official theory. The classical theory of general relativity is the one that Einstein invented.
Original theory of relativity: Galileo GalileiThe theories of general and special relativity: Albert EinsteinAlbert Einstein developed the theory of relativity.Albert Einstein developed the theory of relativity between 1907 through 1915. It was further developed by Max Planck, Hermann Minkowski, and others.If you are referring to the theory of relativity it would be Albert EinsteinAlbert Einstein
The theorizer of relativity would be Albert Einstein. Einstein's theory of relativity consisted of special relativity and general relativity. It has to do with relative measurements of quantities to observes, like space contracts and time dilates. Space time was a concept of relativity. The speed of lights invariance was also a part of the theory.
Theory of general relativity - Albert Einstein (1916)
There are actually two different theories with this name: the Special Theory of Relativity, and the General Theory of Relativity. Both are from Albert Einstein.
Einstein deduced his Theory of General Relativity from trying to understand gravity, it was essentially his theory of how gravity worked and why it functioned that way
Albert Einstein published the works now referred to as Special Relativity in 1905 and General Relativity in 1916.