2 4 0 D O C U M E N T 2 4 7 A U G U S T 1 9 2 8 (not given in your notes). I will write a short communication about what I have just discussed. Would you like to submit it for the Sitzungsberichte in Berlin? If so, please write me a brief note as to when I would have to send in the manuscript. With respect, yours truly, R. Weitzenböck In the same post, I am sending you some articles that refer to the questions dis- cussed here.[13] 247. From Chaim Herman Müntz 2 August 1928 Dear Professor, Many thanks, to your kind wife as well, for your friendly letters. We sincerely hope that you will soon succeed in finding a home that is quite to your liking, and we are of course happy to be at your disposal for possible future “ancillary expeditions.” [1] Now to the compatibility question. In reply to Mr. Grommer’s doubts as to whether , perhaps does not belong[2] to any total solution of the fundamental equation, you had expressed the conjecture that in fact for every solu- tion of (B) : , there is a total solution (A). In the following, I now give the proof that your conjecture was correct, and that the centrally symmet- ric special case is also included, so that at least the old theory would appear to be secure. To first approximation, we find:[3] with reversed sign. According to the suggestion that you made for the integration, set [4] without summation over  , etc. furthermore, a new result: without summation over . becomes I 1  g    g    = =  a 0 =  4 r–1 =   0 =     0 = B      0     0 = = B h   h     h     –   =  4 = h   H   x  ------------- - = H    H 4   H  + =      x  ------------- - = B   