8,115
edits
(Pseudo-)Riemannian Geometry: Difference between revisions
ââ2021
No edit summary |
|||
| Line 326: | Line 326: | ||
}} | }} | ||
{{Tweet | |||
|image=Eric profile picture.jpg | |||
|nameurl=https://x.com/EricRWeinstein/status/1413561365545947137 | |||
|name=Eric Weinstein | |||
|usernameurl=https://x.com/EricRWeinstein | |||
|username=EricRWeinstein | |||
|content=But in standard Relativity theory as an effective theory, I donât think about FTL. Sorry. | |||
|thread= | |||
{{Tweet | |||
|image=Eric profile picture.jpg | |||
|nameurl=https://x.com/EricRWeinstein/status/1413552255077208066 | |||
|name=Eric Weinstein | |||
|usernameurl=https://x.com/EricRWeinstein | |||
|username=EricRWeinstein | |||
|content=Physicsâ Overton Window. | |||
We can talk about CRAZY stuff thatâs irrelevant to our lives & never progresses: Boltzmann Brains, Many Worlds, String Theory Unification, AdS, Super-partners, etc. | |||
[[Anything But Physics|We canât talk about anything that COULD suddenly change everything.]] UAP, other TOEs, etc | |||
|timestamp=5:34 PM · Jul 9, 2021 | |||
}} | |||
{{Tweet | |||
|image=Eric profile picture.jpg | |||
|nameurl=https://x.com/EricRWeinstein/status/1413554336068632576 | |||
|name=Eric Weinstein | |||
|usernameurl=https://x.com/EricRWeinstein | |||
|username=EricRWeinstein | |||
|content=My point isnât at all that low probability topics are likely to change everything. Itâs that we feel *safe* knowing certain crazy ideas always seem to lead nowhere. But we feel unsafe when we donât know if what weâre looking at *could* surprise us by suddenly changing our world. | |||
|timestamp=5:43 PM · Jul 9, 2021 | |||
}} | |||
{{Tweet | |||
|image=Eric profile picture.jpg | |||
|nameurl=https://x.com/EricRWeinstein/status/1413561361838186496 | |||
|name=Eric Weinstein | |||
|usernameurl=https://x.com/EricRWeinstein | |||
|username=EricRWeinstein | |||
|content=An example: In GU, relativity theory is recovered from the Observerse which is constructed around two separate spaces X and Y. Einsteinâs Spacetime (a signature (1,3) 4-manifold with [[(Pseudo-)Riemannian Geometry|pseudo Riemannian metric]]) is recovered from observations of Y by X. | |||
|timestamp=6:11 PM · Jul 9, 2021 | |||
}} | |||
{{Tweet | |||
|image=Eric profile picture.jpg | |||
|nameurl=https://x.com/EricRWeinstein/status/1413561363629105152 | |||
|name=Eric Weinstein | |||
|usernameurl=https://x.com/EricRWeinstein | |||
|username=EricRWeinstein | |||
|content=Another example. Some see spacetime as the commutative limit of a non-commutative manifold. That would be beyond relativity. | |||
Others see topology changing operators that allow agents to change spacetime topologically. Again that would be beyond the usual relativity theory. | |||
|timestamp=6:11 PM · Jul 9, 2021 | |||
}} | |||
|timestamp=6:11 PM · Jul 9, 2021 | |||
}} | |||
=== 2025 === | === 2025 === | ||