Timeline for Finitely generated subgroups with infinite cyclic quotient
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 20, 2018 at 15:01 | comment | added | AGenevois | It seems that the invariant $\Sigma^1$ was introduced by R. Bieri, W. D. Neumann and R. Strebel (in their paper untitled A geometric invariant of discrete groups, 1987), and next the invariants $\Sigma^2, \Sigma^3, \ldots$ were introduced by R. Bieri and B. Renz (in their paper untitled Valuations on free resolutions and higher geometric invariants of groups, 1988). So I guess that the R in BSNR stands for Renz. | |
| Apr 20, 2018 at 12:54 | comment | added | user1729 | Who is the "R" in BNSR? (I know BNS=Bieri, Neumann and Strebel.) | |
| Apr 15, 2018 at 12:38 | history | edited | AGenevois | CC BY-SA 3.0 |
added 16 characters in body
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| Mar 25, 2018 at 11:56 | history | answered | AGenevois | CC BY-SA 3.0 |