Timeline for Example of tensor category with non-simple unit $J\to \mathbb{1} \to Q$ and suitably extension $Q\to M\to J$
Current License: CC BY-SA 4.0
3 events
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| Jul 6, 2018 at 7:21 | comment | added | Simon Lentner | Thank you very much! The Nakayama-Argument with the splitting idempotent was unknown to me. I understand now, why this is not possible...But this leaves me puzzled: I know this category exists, yet it appearently cannot be realized as modules over a ring....? (I'll edit accordingly) | |
| Jul 5, 2018 at 22:00 | history | edited | Neil Strickland | CC BY-SA 4.0 |
added 6 characters in body
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| Jul 5, 2018 at 21:48 | history | answered | Neil Strickland | CC BY-SA 4.0 |