Ideas about how a world with more than three spatial dimensions would work - what laws of physics would be needed, how things would be built, how people would do things and so on.

What will the GR become in higher and lower demetions?
In the book Planiverse ,the author told us that the GR can't work in 2D space because it can't contain any gravity.
I'm interested in that and I want to know more about that.
So,what will the GR become in 4D and 2D?

P.S. Please forgive my grammar and spelling mistakes,I'm not good at English.
Belta IX
Nullonian

Posts: 2
Joined: Sat Jul 23, 2022 12:26 am

### Re: About the General Relativity

Here's something on Greg Egan's site: https://www.gregegan.net/SCIENCE/GR2plus1/GR2plus1.html

(And unrelated to GR, but related to other things discussed on hi.gher.space: https://www.gregegan.net/SCIENCE/24-cell/24-cell.html )
ΓΔΘΛΞΠΣΦΨΩ αβγδεζηθϑικλμνξοπρϱσςτυϕφχψωϖ °±∓½⅓⅔¼¾×÷†‡• ⁰¹²³⁴⁵⁶⁷⁸⁹⁺⁻⁼⁽⁾₀₁₂₃₄₅₆₇₈₉₊₋₌₍₎
ℕℤℚℝℂ∂¬∀∃∅∆∇∈∉∋∌∏∑ ∗∘∙√∛∜∝∞∧∨∩∪∫≅≈≟≠≡≤≥⊂⊃⊆⊇ ⊕⊖⊗⊘⊙⌈⌉⌊⌋⌜⌝⌞⌟〈〉⟨⟩
mr_e_man
Tetronian

Posts: 524
Joined: Tue Sep 18, 2018 4:10 am

### Re: About the General Relativity

Your answer is perfact,the only problem is that it's hard to anderstand the words .
Thank you.
Belta IX
Nullonian

Posts: 2
Joined: Sat Jul 23, 2022 12:26 am