List questions from semi-riemannian-geometry

Published on 19 Nov 2020 - 7:05

65

Views

3-dimensional slice of $\zeta^{2,2}$

Published on 23 Feb 2026 - 10:02

77

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Is $ds^2=\frac{dxdy}{xy(x-1)(y-1)}$ a valid semi-Riemannian metric?

Published on 25 Nov 2020 - 22:25

972

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What exactly are Cayley-Klein geometries?

Published on 26 Mar 2026 - 8:15

303

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How to prove $M\in O^+(n,1)$ can always be decomposed to the product of two matrices

Published on 26 Nov 2020 - 12:20

342

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foliation of a globally hyperbolic spacetime by Cauchy hypersurfaces

Published on 25 Mar 2026 - 13:13

239

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extrapolate 3-vector field in $(0,1)^3$ from boundary vector fields

Published on 09 Dec 2020 - 17:22

52

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Regular black hole: defocusing point case

Published on 14 Dec 2020 - 0:03

208

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How does the manifold topology affect the properties of the metric tensor?

Published on 27 Dec 2020 - 8:41

45

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Does every frame contain the same number of time-like and space-like vectors?

Published on 03 Jan 2021 - 5:50

40

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Proving that a vector field is a gradient vector field that comes from conformal immersions enveloping a common sphere congruence

Published on 04 Jan 2021 - 17:48

89

Views

Is $\zeta^{3,1}\simeq \Bbb M^{3,1}?$ Why or why not?

Published on 09 Jan 2021 - 0:14

88

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Covariant derivative of functions between manifolds

Published on 15 Jan 2021 - 10:26

109

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Riemann and Ricci tensor

Published on 09 Feb 2021 - 16:37

315

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Is there an analogue of the moduli space of the torus in semi-Riemannian signature?

Published on 09 Feb 2021 - 20:47

List Question

Usage/Application of Raychaudhuri equation in Riemann geometry or pure maths

3-dimensional slice of $\zeta^{2,2}$

Is $ds^2=\frac{dxdy}{xy(x-1)(y-1)}$ a valid semi-Riemannian metric?

What exactly are Cayley-Klein geometries?

How to prove $M\in O^+(n,1)$ can always be decomposed to the product of two matrices

foliation of a globally hyperbolic spacetime by Cauchy hypersurfaces

extrapolate 3-vector field in $(0,1)^3$ from boundary vector fields

Regular black hole: defocusing point case

How does the manifold topology affect the properties of the metric tensor?

Does every frame contain the same number of time-like and space-like vectors?

Proving that a vector field is a gradient vector field that comes from conformal immersions enveloping a common sphere congruence

Is $\zeta^{3,1}\simeq \Bbb M^{3,1}?$ Why or why not?

Covariant derivative of functions between manifolds

Riemann and Ricci tensor

Is there an analogue of the moduli space of the torus in semi-Riemannian signature?

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