Albert Einstein handwritten ‘General Relativity’ mathematical manuscriptOriginal unsigned mathematical manuscript written by the German born physicist, humanitarian and Nobel Prize winner Albert Einstein (1879 1955). The unsigned and undated manuscript features nine lines of intricate equations in Einstein's crisp handwriting. Between the seventh and eighth lines, Einstein has written in German, "in Special system." These equations are thought to relate to his 'metric tensor,' which expresses space time curvature in the