Timeline for Operation on Isospectral graphs
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 18, 2011 at 23:53 | comment | added | Igor Rivin | Perhaps this will remind Chris: homepages.cwi.nl/~mueller/haemers.pdf | |
| Dec 18, 2011 at 23:50 | comment | added | Igor Rivin | See en.wikiquote.org/wiki/Stanislaw_Ulam | |
| Dec 18, 2011 at 23:44 | comment | added | Igor Rivin | Actually, I believe it was Stan Ulam, not Erdos, who said that. | |
| Dec 18, 2011 at 23:31 | comment | added | Gordon Royle | There are three signs of senility. The first sign is that a man forgets his theorems. The second sign is that he forgets to zip up. The third sign is that he forgets to zip down. (Erdos) | |
| Dec 18, 2011 at 23:01 | history | answered | Brendan McKay | CC BY-SA 3.0 |