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Mar 23, 2023 at 12:29 vote accept Carl-Fredrik Nyberg Brodda
Mar 22, 2023 at 13:23 comment added Carl-Fredrik Nyberg Brodda Very nice, thanks! (Small note: the result attributed to Arzhantseva, Lafont, and Minasyan (2012) in the abstract (a f.p. group with decidable word problem but undecidable order problem) appears already in McCool (1970), but it is also rather non-constructive)
Mar 22, 2023 at 13:09 history answered Giles Gardam CC BY-SA 4.0