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15 votes
1 answer
619 views

Why is the wave equation so pervasive?

11 votes
4 answers
598 views

Why is fundamental physics taught in terms of particles?

9 votes
1 answer
405 views

Non-deterministic particle system

9 votes
0 answers
360 views

View of the sky from inside a black hole

6 votes
1 answer
1k views

Relationship between the continuity equation and the wave equation

4 votes
1 answer
221 views

Terminology used in the Wikipedia article for wormholes

4 votes
1 answer
1k views

Perfect fluid and Cauchy momentum equation

4 votes
2 answers
4k views

The wave equation in general relativity, special relativity, and Cartesian coordinates

3 votes
1 answer
330 views

Intermediate axis theorem in higher dimensions

3 votes
1 answer
243 views

Does one observe light reach infinity in finite time in AdS spacetime?

2 votes
2 answers
1k views

The Alcubierre drive and closed timelike curves

2 votes
1 answer
579 views

Superluminal travel without time travel

1 vote
1 answer
1k views

Lorentz boost matrix in terms of four-velocity

1 vote
1 answer
1k views

Stress-energy tensor explicitly in terms of the metric tensor

1 vote
1 answer
203 views

Spacetime around a massive cylinder

0 votes
0 answers
185 views

Gravitomagnetic railgun