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    Albert Einstein Autograph Letter Signed "A.E." One page, 8.5" x 11", no place; " Sunday" [ circa 1945]. Addressed to his assistant, Ernst Stauss, and written in German. The letter discusses Einstein's publication "Generalization of the Relativistic Theory of Gravitation". Einstein writes in full:

    " I have always thought that the equation [handwritten equation] did not hold true generally but only applied to a specific choice of coordinates. Thus, it is clear that the special approach I had suggested will not lead to anything. If this equation is generally valid, trying g = -1 as a coordinate choice will immediately suggest itself, since it will lead to the simple equation d + 2rf = 0. It has always seemed to me that the introduction [equation] was not of much avail, unless one tried to define Λ specifically at the outset. However, this might be incorrect. I am glad, therefore, that you will try it in such a way that you leave Λ open for a change. It has been announced that the proof sheets for our cosmological paper are ready. I asked the printer to have the proofs sent to you, since all printed material addressed to me will stay in Princeton endlessly. Most likely, however, they sent proofs to each of us anyway. I have now discovered fairly natural means, after all, of setting up equations that are covariant in relation to any and all complex transformations and represent a transfer, with hermetic metric, of the equations Rik = 0 to the complex space. However, I have not yet felt this out sufficiently to get a real sense of whether or not we should take this possibility seriously. I am glad that soon we will be able to see each other with regularity again. In this situation, as we are tentatively feeling our way, correspondence is too cumbersome a means. We will return home around 09/15; maybe then we will be able to see each other in N.Y." An excellent letter containing handwritten equations by Einstein.

    Condition: Flattened mail folds, with light toning throughout. Clear and legible.

    Auction Info

    Auction Dates
    April, 2020
    22nd Wednesday
    Bids + Registered Phone Bidders: 4
    Lot Tracking Activity: N/A
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