On Nov. 25, 1915, Albert Einstein presented his paper The Field Equations of Gravitation to the Prussian Academy of Sciences. This paper contained the equations for his general theory of relativity.Hungary issued a stamp Sept. 7 commemorating the 100th anniversary of this presentation.The 285-forint stamp shows a black-and-white photograph of Einstein on the left, and the mathematical formula of the general theory of relativity on the right.
“The right-hand side of this equation describes the energy contents of our universe (including the ‘dark energy’ that propels the current cosmic acceleration).
“The left-hand side describes the geometry of space-time. The equality reflects the fact that in Einstein’s general relativity, mass and energy determine the geometry, and concomitantly the curvature, which is a manifestation of what we call gravity.” Imre Benedek designed the stamp. It was printed by offset in sheets of 50.( http://www.linns.com)