Yesterday I answered this question Finding best path given a distance transform and after a while it was deleted by its own author.
Can a moderator undelete a question deleted by its author? It seems to me it happened in the past (see I get page not found "voluntarily removed by its author" after I wrote an answer).
Furthermore I would like to know whether the question was deleted directly by its author or the question was deleted following a "close procedure".
Please apologize if I did not read with attention the FAQ about deleted question but I am quite unhappy after spending time and effort in answering that question and seeing it now deleted.