For the case where universe is not flat, has it got an extrinsic curvature towards (an)other spatial dimension(s)?
115517
How could we know that the relativistic curvature of universe is intrinsic?
123430
Can a topological manifold be non-connected and each component with different dimension?
64158
What do we learn from gravity in three spacetime dimensions?
113772
How to measure the curvature of the space-time?
20511
Is it possible to experimentally show that observable universe is much larger than ~93B ly?
145003
How can a point-like particle "feel" gravity, if locally the curvature of spacetime is always flat?
81969
What if the universe is rotating as a whole?
25052
Doesn't dating the universe violate the concept of spacetime's inseparability?
15799
Experimental evidence of a fourth spatial dimension?
64113
Has there ever been a warp / non-warp collision?
51742
What is the curvature of an empty universe?
2983
Shape of the universe?
50566
Nature of gravity: gravitons, curvature of space-time or both?
78769
Assuming that the Cosmological Principle is correct, does this imply that the universe possess an empirically privileged reference frame?
113304
Universe expands ... compared to what?
57945
How do we know dark matter isn't curved spacetime?
112452
Why does dark energy produce positive space-time curvature?