|
2019-12-09: The Doomsday Argument
- 14:06: ... finite or infinite because it may be that there's a slight positive or negative curvature just beyond the sensitivity of our ...
|
|
2019-12-02: Is The Universe Finite?
- 04:26: Rapid expansion tends to give negative curvature and open the universe - make it infinite.
|
|
2019-04-10: The Holographic Universe Explained
- 11:15: While the original space was flat, the new space had negative curvature – it was a hyperbolic, anti-de Sitter or AdS space.
- 16:40: KI9 asks whether the things we learn from AdS/CFT are applicable to the universe we live in given that our universe doesn't have negative curvature.
- 16:50: ... we don't know for sure that it doesn't have negative curvature - just that any curvature - negative or positive - is very weak compared ...
|
|
2019-04-03: The Edge of an Infinite Universe
- 03:25: Finally there’s the universe with negative curvature, and the 2-D analog of that is the hyperbolic surface, like an infinite saddle or pringle.
|
|
2019-02-20: Secrets of the Cosmic Microwave Background
- 07:42: ... effect On the other hand an expanding universe with no energy would have negative curvature So a flat universe must have exactly the right amount of energy to ...
|
|
2019-01-30: Perpetual Motion From Negative Mass?
- 08:01: Negative mass causes negative curvature, which in our sheet analogy looks like pulling the sheet up.
|
|
2017-11-08: Zero-Point Energy Demystified
- 05:36: That means the vacuum energy between Casimir plates still produces positive spatial curvature, not the negative curvature required for warp drives.
|
|
2016-03-23: How Cosmic Inflation Flattened the Universe
- 02:00: On a negative curvature hyperbolic plane-- a saddle-like structure-- they add up to less.
|