Timeline for Can non-split extension be isomorphic to the split one as objects
Current License: CC BY-SA 4.0
8 events
when toggle format | what | by | license | comment | |
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Nov 17, 2020 at 21:50 | comment | added | Francesco Polizzi | Ok, I see. I was confused by "any such sequence" at the beginning of the second part of the answer. | |
Nov 17, 2020 at 21:00 | comment | added | user127776 | The explanation given above for proper variety is general. It is not specialized to the specific short exact sequence of trivial bundles given at the start. | |
Nov 17, 2020 at 20:37 | comment | added | Francesco Polizzi | Does this really refute my example? My middle term is not balanced, how do you reduce yourself to the case of the sum of two trivial bundles? | |
Nov 17, 2020 at 20:11 | comment | added | Nicolas Hemelsoet | @user127776 : I think the explanation is given by my comment below | |
Nov 17, 2020 at 20:11 | vote | accept | user127776 | ||
Nov 17, 2020 at 20:11 | comment | added | user127776 | Yes my $X$ is proper. Your argument is super-smart. So there are no examples of such thing on projective line. This refutes one of the comments above. Thanks. | |
Nov 17, 2020 at 20:09 | history | edited | SashaP | CC BY-SA 4.0 |
deleted 17 characters in body
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Nov 17, 2020 at 20:00 | history | answered | SashaP | CC BY-SA 4.0 |