Timeline for Second homotopy group of the wedge sum of $S^2$ with the presentation complex of a finitely generated group
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 20, 2020 at 0:04 | vote | accept | Hussain Kadhem | ||
| Oct 19, 2020 at 22:12 | answer | added | Joshua Mundinger | timeline score: 4 | |
| Oct 19, 2020 at 22:11 | history | edited | Hussain Kadhem | CC BY-SA 4.0 |
clarification
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| Oct 19, 2020 at 22:08 | comment | added | Fernando Muro | Hussain, could you then rephrase your question to ask that? A geometric answer would be that the covering space of $X'$ can be obtained from that of $X$ by attaching a copy of $S^2$ to each vertex. | |
| Oct 19, 2020 at 21:45 | comment | added | Hussain Kadhem | Right, but I don't follow how the inclusion of $S^2$ induces an inclusion of $\mathbb{Z}[G]$. (Also fixed the markup thanks.) | |
| Oct 19, 2020 at 21:44 | history | edited | Hussain Kadhem | CC BY-SA 4.0 |
deleted 2 characters in body
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| Oct 19, 2020 at 21:41 | review | Close votes | |||
| Oct 24, 2020 at 3:06 | |||||
| Oct 19, 2020 at 21:26 | history | edited | YCor | CC BY-SA 4.0 |
formatting, added tags
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| Oct 19, 2020 at 21:21 | comment | added | Fernando Muro | The map $\alpha$ is just the inclusion of $S^2$ in $X\vee S^2$ (note that the topologist's wedge symbol $\vee$ is \vee, not \wedge). | |
| Oct 19, 2020 at 21:17 | history | asked | Hussain Kadhem | CC BY-SA 4.0 |