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Removed by admin.
Curious. The page is empty. The IP address is 36.157.176.71, in case that helps see if this was some kind of spam-testing raid.
The page wasn’t created by clicking on a misspelled grey link as ’07tale’ appears nowhere else in the lab that my search can find. Google can only find one other occurrence of the phrase in the title, at https://braintwobrain.blogspot.com/2011/07/la-notte-della-rete.html
There is already an entry on Lectures on Étale Cohomology referring to Milne’s lecture notes. I suggest renaming to Empty ??? or deleting.
The nginx logs for this are as follows.
36.157.176.71 - - [21/Aug/2018:00:11:29 -0400] "GET /nlab/show/diff/Lectures+on+07tale+Cohomology HTTP/1.1" 302 124 "http://xueshu.baidu.com/s?wd=paperuri%3A%2880b503813ecf1e38ca35c93fb7f0e97c%29&filter=sc_long_sign&sc_ks_para=q%3DLectures%20on%20%C3%89tale%20Cohomology%20%28changes%29&sc_us=6427978504864764650&tn=SE_baiduxueshu_c1gjeupa&ie=utf-8" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36" "36.157.176.71" 0.027 0.026
36.157.176.71 - - [21/Aug/2018:00:11:30 -0400] "GET /nlab/new/Lectures+on+07tale+Cohomology HTTP/1.1" 200 12766 "http://xueshu.baidu.com/s?wd=paperuri%3A%2880b503813ecf1e38ca35c93fb7f0e97c%29&filter=sc_long_sign&sc_ks_para=q%3DLectures%20on%20%C3%89tale%20Cohomology%20%28changes%29&sc_us=6427978504864764650&tn=SE_baiduxueshu_c1gjeupa&ie=utf-8" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36" "36.157.176.71" 0.046 0.047
36.157.176.71 - - [21/Aug/2018:00:11:59 -0400] "POST /nlab/save/Lectures+on+07tale+Cohomology HTTP/1.1" 302 125 "https://ncatlab.org/nlab/new/Lectures+on+07tale+Cohomology" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36" "36.157.176.71" 1.050 1.050
36.157.176.71 - - [21/Aug/2018:00:12:00 -0400] "GET /nlab/show/Lectures+on+07tale+Cohomology HTTP/1.1" 200 10872 "https://ncatlab.org/nlab/new/Lectures+on+07tale+Cohomology" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36" "36.157.176.71" 0.241 0.241
The first entry here is the most interesting, it shows that the person came to the page creation link directly, in a rather curious way (the person tried to view a diff page for a non-existent page, and was redirected to the page creation page), from the baidu search engine! After that, I suppose that they were confused and created the page. Presumably there is some kind of bug in baidu that does not handle the unicode symbol É in Lectures on Étale cohomology, and some further weird behaviour that causes it to link to diff pages (I cannot imagine that the person was actually searching for such a page). Curiously, the IP address does not appear anywhere else in the logs. Not quite sure how we can get around this. We could prevent page creation with no content, to at least make it more difficult. We could also prevent redirecting to creation of a new page from a non-existent diff page.
I will delete the page and this thread later, so that others have a chance to see this if they are interested.
I have now deleted the page and removed the contents of #1 in this thread.
In addition, I have implemented the two suggestions I made in the last two sentences of the penultimate paragraph of #4, to hopefully help avoid such page creations in future. I also took the opportunity to improve the page displayed when a 404 occurs in the most comman cases.
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