Physics
Ryan Unger's user avatar
Ryan Unger's user avatar
Ryan Unger's user avatar
Ryan Unger
  • Member for 9 years, 2 months
  • Last seen this week
  • Princeton, NJ, USA
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About

Math PhD student. Interested in geometric analysis and mathematical general relativity.

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All Questions Answers
Score Newest
answer
68
Books for general relativity
Apr 4, 2016
question
28
Do light waves precisely follow null geodesic paths in General Relativity?
Dec 18, 2015
answer
21
A helpful proof in contracting the Christoffel symbol?
Feb 3, 2017
question
19
How long can a particle survive inside of the horizon of a black hole?
Jul 16, 2015
answer
18
Adding a total time derivative term to the Lagrangian
Apr 4, 2015
answer
17
Metric inside a sphere of uniform density?
Apr 8, 2015
answer
16
Why do the Einstein field equations (EFE) involve the Ricci curvature tensor instead of Riemann curvature tensor?
Jan 28, 2015
answer
16
How could a cord withstand a force greater than its breaking strength?
Feb 15, 2015
answer
15
Geodesic equation from Euler - Lagrange
Mar 31, 2015
answer
11
Is it always possible to have a (local) time coordinate in GR?
Jan 7, 2017
Top Meta posts
3
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22
Why did I get chat suspended for a year?
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36
Mathematica stuck in "running" for every calculation I attempt, kernel error
26
Proving Cartan's magic formula using homotopy
21
Why are geodesically convex sets diffeomorphic to $\Bbb R^n$?
16
Why are geodesically convex sets diffeomorphic to $\Bbb R^n$?
16
Can a set of Hausdorff codimension 2 disconnect a connected open set?

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