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PPenguin
  • Member for 6 years, 11 months
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19 votes
3 answers
1k views

In what sense (if any) is Action a physical observable?

15 votes
3 answers
2k views

Electromagnetic field energy "paradox"

6 votes
1 answer
168 views

Do galaxies have a halo of neutrinos and cosmic microwave background?

5 votes
3 answers
594 views

How to see $\mathbf{E}\cdot\mathbf{B}$ is a total derivative?

5 votes
3 answers
240 views

Current constraints on Dark Matter self-interaction from galactic profiles

4 votes
2 answers
1k views

Isotropic Schwarzschild coordinates

1 vote
1 answer
101 views

Cosmological constant in GR can induce vector field tachyons?

1 vote
1 answer
574 views

Density Functional Theory for Quantum Field Theory vs fixed-particle-number Quantum Mechanics

1 vote
1 answer
35 views

Average magnetic field inside a sphere of vacuum in magnetostatic case

0 votes
1 answer
85 views

A "local clock time" coordinate system outside spherical mass

0 votes
0 answers
105 views

Numerical solutions with insufficient boundary conditions