Given Lothar Collatz was German and he died in September of 1990 I'd assume something about his death (a remembrance of some kind) triggered it. Most of the se

Given Lothar Collatz was German and he died in September of 1990 I'd assume something about his death (a remembrance of some kind) triggered it. Most of the searches are from Germany along with neighboring Switzerland and Denmark. Also note someone posted a picture of him on his Wikipedia page in Sept. '09 which is the first time the page had been touched by a non-bot in 15 months (http://en.wikipedia.org/w/index.php?title=Lothar_Collatz&action=historysubmit&diff=312437360&oldid=285135406 http://en.wikipedia.org/w/index.php?title=Lothar_Collatz&#38...) (He's also mentioned in the Sept. 2009 issue of the European Mathematical Society Newsletter for what it's worth)