Top network posts

• 40 Do an action and its Euler-Lagrange equations have the same symmetries?
• 33 Would a spin-2 particle necessarily have to be a graviton?
• 29 Why does no physical energy-momentum tensor exist for the gravitational field?
• 29 What really are superselection sectors and what are they used for?
• 29 What is the difference between scale invariance and self-similarity?
• 26 "S-duality" between confinement and the Higgs mechanism?
• 25 How is the logarithmic correction to the entropy of a non-extremal black hole derived?
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