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Jul 21 at 5:19 comment added ronno @Cihan thanks, fixed.
Jul 21 at 5:18 history edited ronno CC BY-SA 4.0
deleted 2 characters in body
Jul 20 at 20:18 comment added Cihan I think the (possibly) non-trivial differential is $d_{2r}$.
S Apr 15 at 3:58 review First answers
Apr 15 at 4:08
S Apr 15 at 3:58 history answered ronno CC BY-SA 4.0
S Apr 15 at 3:58 history made wiki Post Made Community Wiki by ronno