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Mar 8, 2022 at 14:17 comment added Jan Grabowski No I can't sorry. I struggled to find this set out anywhere - it took a bit of digging even to turn up that non-degenerate and perfect were the right terminology.
Mar 8, 2022 at 14:14 comment added Adam Bondal Could you please provide a reference for this?
Mar 8, 2022 at 14:14 vote accept Adam Bondal
Mar 8, 2022 at 14:14 comment added Adam Bondal Even for $R = \mathbb{Z}$ . . . I didn't know life was so cruel.
Mar 8, 2022 at 14:03 comment added Jan Grabowski By an odd coincidence, I've spent the last few weeks in exactly this situation, and mildly grumpy that this isn't true as it would save a pile of work...
Mar 8, 2022 at 14:02 history answered Jan Grabowski CC BY-SA 4.0