Timeline for If the Universe is Flat, has Finite Mass/Energy, and is Simply Connected, Then there MUST be an Edge, Mustn't there?
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 17, 2019 at 16:33 | comment | added | Eli Bashwinger | @BobBee Being simply connected does not mean that the topological space has the trivial topology; it means that the space is path-connected and the fundamental group of the space is (the) trivial (group). I now see that you attach the indefinite article to "trivial topology", so perhaps you mean something very specific by that phrase. | |
| Feb 12, 2017 at 12:34 | comment | added | Bob Bee | Homogeneous before possibly (and it is not known if multiple bubbles, just a possibility called eternal inflation) multiple bubbles. After a bubble, like our universe, homogeneous inside and then other sprinkled bubbles. And.bubbles are just areas where there was inflation, no edges. Remember bubbles is just an unproven theory. | |
| Feb 12, 2017 at 11:45 | comment | added | The_Sympathizer | (cont'd) there is "no theoretical reason to think so". This seems contradictory. What is going on? | |
| Feb 12, 2017 at 11:44 | comment | added | The_Sympathizer | "It could theoretically still be true that out inflation bubble is homogeneous, and thus the part of the universe beyond our particle horizon might not be, but there is no theoretical reason to think so. The more prevalent view is that it was as uniform more or less, and the same inflation that created our bubble might have created others." I'm not sure if I get this. If it formed multiple "bubbles" then there must be boundaries between them right? And so then the "part beyond the horizon" would not be homogeneous because of the changes between bubbles, yet you say (cont'd) | |
| S Feb 12, 2017 at 2:25 | history | edited | Maxim Umansky | CC BY-SA 3.0 |
fixed small typos
|
| S Feb 12, 2017 at 2:25 | history | suggested | rav_kr | CC BY-SA 3.0 |
mobile wikipedia -> wikipedia
|
| Feb 12, 2017 at 2:13 | review | Suggested edits | |||
| S Feb 12, 2017 at 2:25 | |||||
| Feb 12, 2017 at 1:43 | vote | accept | Jasper T. Scott | ||
| Feb 12, 2017 at 0:08 | history | edited | Bob Bee | CC BY-SA 3.0 |
Added about finite mass in unbounded universe, unlikely. Added all the flat 3D multiply connected spatial topologies
|
| Feb 11, 2017 at 23:53 | history | edited | Bob Bee | CC BY-SA 3.0 |
Added all the flat 3D multiply connected spatial topologies
|
| Feb 11, 2017 at 23:46 | history | answered | Bob Bee | CC BY-SA 3.0 |