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Apr
27
revised Interpretation of black-hole infalling and apparent geometry of the event horizons
edited title
Apr
27
revised Interpretation of black-hole infalling and apparent geometry of the event horizons
deleted 1 character in body
Apr
27
asked Interpretation of black-hole infalling and apparent geometry of the event horizons
Apr
12
awarded  Popular Question
Mar
29
awarded  Popular Question
Mar
29
revised Schwinger metals?
added 12 characters in body
Mar
26
revised Schwinger metals?
added 285 characters in body
Mar
26
comment warp drive with gravitational waves in the nonlinear regime
yeah, the required amplitudes are inmense. A back-of-the-napkin estimate suggests at least a million solar masses must be turned into phase-locked gravitational sources, spinning at 3 km/sec, to have a beam of the required amplitude
Mar
26
asked Schwinger metals?
Mar
1
awarded  Nice Answer
Feb
18
awarded  Popular Question
Jan
16
accepted Einstein tensor of a gravitational source
Jan
15
answered Einstein tensor of a gravitational source
Jan
13
revised Einstein tensor of a gravitational source
added 293 characters in body
Jan
12
revised Einstein tensor of a gravitational source
deleted 1 character in body
Jan
12
asked Einstein tensor of a gravitational source
Jan
12
accepted Simple quadrupole field not yet in Lorenz gauge?
Dec
29
comment Simple quadrupole field not yet in Lorenz gauge?
I am quoting 1st paragraph page 80, "in the case of linearized gravity, we can use the restricted gauge freedom, equation (4.4.27), to achieve the radiation gauge $\gamma=0$, $\gamma_{\mu 0}=0$ for $\mu=1,2,3$ in a source free region"
Dec
29
accepted Proving that Killing form contractions with geodesics are constants of motion
Dec
29
comment Proving that Killing form contractions with geodesics are constants of motion
ok that makes sense