Could I request that Question 290941 be undeleted? It is a sensible question, and I spent some time finding a reference for the answer. It was then deleted by the poster - I have no idea why.
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6$\begingroup$ Possible duplicate of Requests for reopen and undelete votes for on-hold, closed, and deleted questions $\endgroup$– JRNJan 18, 2018 at 13:59
1$\begingroup$ You might want to post your question as an answer to meta.mathoverflow.net/q/223/12357 $\endgroup$– JRNJan 18, 2018 at 13:59
2$\begingroup$ For the benefit of users who are below 10k reputation points, at the moment some version of that question is still visible in Google cache. $\endgroup$– Martin SleziakJan 18, 2018 at 14:01
4$\begingroup$ And it is also mentioned in the question that the same question was asked on Theoretical Computer Science site: Is Normal centralizer problem in P? $\endgroup$– Martin SleziakJan 18, 2018 at 14:18
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