Timeline for two conjugate subgroups and one is a proper subset of the other? plus, a covering space interpretation.
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Mar 30, 2023 at 20:02 | comment | added | Rafi | Ps.: Let X be the genus 2 surface. There is an obvious continuous map f : X → S¹ ∨ S¹ that induces a surjection on π₁ (for a suitable choice of basepoint). Pulling back along f then gives us an example of a noninvertible endomorphism of a connected cover of a compact smooth surface. So such (endomorphisms of) covers exist for even the most "real world" examples of spaces. | |
| S Mar 29, 2023 at 21:13 | review | First answers | |||
| Mar 29, 2023 at 21:46 | |||||
| S Mar 29, 2023 at 21:13 | history | edited | Rafi | CC BY-SA 4.0 |
Formatting stuff
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| S Mar 29, 2023 at 20:44 | review | First answers | |||
| Mar 29, 2023 at 20:54 | |||||
| S Mar 29, 2023 at 20:44 | history | answered | Rafi | CC BY-SA 4.0 |