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Apr 5, 2021 at 16:50 comment added Hailong Dao @Alessio: it's ok, I don't really care, as long as it was useful.
Apr 5, 2021 at 8:24 vote accept Alessio
Apr 5, 2021 at 8:24 comment added Alessio Sorry for that! :-( I don't know much how the point system works here on MO, but if I can do anything to bump your question up, I'll do. It's a good one!
Apr 4, 2021 at 17:56 comment added Hailong Dao @Alessio: now it makes sense. Looks like a few people have downvoted my answer because of that. (-: Ah well, I don't really want to bump my answer up by trivial editing, so let's leave it like that.
Apr 4, 2021 at 17:46 comment added Alessio My bad here. There was a typo in the notation for $d$ in my original question. Then I changed it, but I didn't realize that meanwhile Long had already posted! By the way, thank you @HailongDao for your answer, very interesting that the only non-trivial cases are in dimensions $2$ and $3$
Apr 4, 2021 at 14:56 comment added Hailong Dao @uno: Then translate everything by $1$.
Apr 3, 2021 at 17:42 history answered Hailong Dao CC BY-SA 4.0