Jorge Casajus
  • Member for 11 months
  • Last seen more than a month ago
1 answers
4 votes
61 views
1 bookmarks
Torsion tensor symmetrisation
3 answers
3 votes
385 views
How does the scale factor depend on temperature?
1 answers
2 votes
68 views
Why can we say that $dt_{obs}=(1+z)dt$?
1 answers
2 votes
526 views
1 bookmarks
Transverse-traceless gauge: Why the traceless condition?
1 answers
1 votes
38 views
Relation between central and mean density in a White Dwarf (polytropic model)
1 answers
1 votes
44 views
Is the fact that we're moving with a certain speed with respect to the CMB special-relativity consistent?
1 answers
1 votes
155 views
How does one integrate the Fermi-Dirac distribution using the zeta function?
2 answers
1 votes
77 views
Is this general relativity diagram correct?
1 answers
1 votes
141 views
Vanishing covariant derivative of a vector field
2 answers
1 votes
96 views
Alternative form of the geodesic equations
1 answers
1 votes
72 views
1 bookmarks
Show that a geodesic remains of the same type at all points by first proving that $v^a w_a$ remains constant when parallel-transported
0 answers
0 votes
20 views
What's a scaling relation in cosmology/astrophysics?
0 answers
0 votes
36 views
Which units does $d_H=3t$ have?
2 answers
0 votes
54 views
Finding the number density of a Fermi gas
0 answers
0 votes
24 views
Why do you have to ponder the number of degrees of freedom of a specie by its temperature?
1 answers
0 votes
74 views
Where does the relation $H=1.66g_*\frac{1}{2} \frac{T^2}{M_P}=\frac{1}{2t}$ come from and what's the meaning of it?
1 answers
0 votes
53 views
How can I get an intuitive explanation of the visualization of geodesics in a cone?
0 answers
0 votes
52 views
Gravitational light bending
1 answers
0 votes
86 views
Prove that covariant differentiation obeys the product rule
1 answers
0 votes
80 views
Geodesics equation in a 2-space with a certain $ds^2$
0 answers
0 votes
73 views
1 bookmarks
On the solving of the geodesic equations
1 answers
0 votes
38 views
Relativistic Doppler effect for parallel-moving observers
0 answers
0 votes
16 views
Compton scattering from moving frame
0 answers
0 votes
18 views
Hydrogen atom: Estimation of binding energy from each force
2 answers
0 votes
114 views
Galilean invariance of Newton's universal gravitation law