Talk:Lothar Collatz

Posthumous paper after more than a decade?
A recent addition to the page says that "Collatz's 1957 paper with Ulrich Sinogowitz, who had been killed in the bombing of Darmstadt in World War II, founded the field of spectral graph theory." Is this correct? Sinogowitz was killed in 1945 or earlier, but was the author of a paper from 1957? I guess it's not impossible -- maybe they worked together on it but Collatz didn't get around to finishing/publishing it for a long time -- but maybe this should be double checked? Rwv37 (talk) 11:59, 1 January 2019 (UTC)


 * I found this: https://link.springer.com/article/10.1007/BF02941924
 * Under "Additional information" it says (translation by me):
 * "Dr. Ulrich Sinogowitz died on 9/12/1944 in Darmstadt due to war incidences. Already then [I suppose shortly before] there were plans for a joint work; No. 1, 3, 4 and table I of this paper go mainly back to the former [Lothar Von Collatz], No. 2 and tables II and III to the latter author [Ulrich Sinogowitz]."
 * So it seems like this paper was in fact published quite some time after Sinogowitz' death. 178.8.193.61 (talk) 01:30, 29 April 2022 (UTC)