Timeline for Geometry of the space of circles in the Euclidean plane
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 16, 2014 at 16:31 | vote | accept | john mangual | ||
| Dec 11, 2014 at 21:14 | history | edited | Robert Bryant | CC BY-SA 3.0 |
deleted 4 characters in body
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| Dec 11, 2014 at 17:17 | history | edited | Robert Bryant | CC BY-SA 3.0 |
Fixed an error that led to describing the double cover of the desired object
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| Dec 11, 2014 at 17:03 | comment | added | Robert Bryant | @DylanThurston: Oh, yes, you are right. I always think oriented circles, but, of course, the subgroup preserving a circle need not preserve the orientation, so it's actually the quotient by the orientation-reversing involution. I'll fix the answer above. | |
| Dec 11, 2014 at 16:38 | comment | added | Dylan Thurston | You're actually describing the double cover of the correct answer, which is also the space of oriented circles. | |
| Dec 11, 2014 at 16:23 | comment | added | Hao Chen | We also call it "de Sitter space". | |
| Dec 11, 2014 at 16:21 | history | edited | Robert Bryant | CC BY-SA 3.0 |
Added a bit more detail to the answer
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| Dec 11, 2014 at 16:13 | history | answered | Robert Bryant | CC BY-SA 3.0 |