1,380 reputation
1611
bio website code.google.com/p/notebk
location Los Angeles, CA
age
visits member for 2 years, 4 months
seen 9 hours ago

A mathematician, a programmer, etc. etc.

My interests are limited to classical general relativity, quantum gravity, mathematical aspects of quantum field theory, and related fields.


1d
comment Why is the phase space a symplectic manifold rather than a manifold with a metric?
Minor stuff: (a) isn't it spelt "torsion-free"? Now for the major question: (b) I have forgotten, so this may be stupid, but isn't the lack of local invariants on a Symplectic manifold responsible for Darboux's theorem (more or less)?
Sep
16
comment Boundary term in Einstein-Hilbert action
Eric Poisson's lecture notes on Advanced General Relativity (pdf), which formed the basis of his book Relativist's Toolkit, discusses this (in chapter 4)...
Sep
4
revised A Conceptual Problem With the Field Equations of General Relativity
added Deser's paper reference
Sep
4
answered A Conceptual Problem With the Field Equations of General Relativity
Aug
30
answered Toy models of asymptotic safety?
Aug
26
comment Is there a general stress-energy tensor for vector fields?
@firtree minor detail: the expression quoted is for a massive and complex free scalar field, hence the $m$ and the $\bar{\phi}$ quantities. But that aside, you are correct.
Aug
26
comment Variational derivatives of strongly connected diagrams functional in gauge theory
@ACuriousMind, from what Google Translator tells me (and what pg 215 says), $K^{a}_{\mu}$ is the external source for $sA^{a}_{\mu}$ where $s$ is the Slavnov operator...
Aug
26
revised Variational derivatives of strongly connected diagrams functional in gauge theory
Re-formatted quite a bit (the whole thing); improved TeX
Aug
26
suggested suggested edit on Variational derivatives of strongly connected diagrams functional in gauge theory
Aug
20
comment Tricks for Computing Riemann Curvature Tensor with Levi-Civita connection
If you know about differential forms, you may want to consider computing the curvature 2-form (far easier when the metric is diagonal and you can easily guess the tetrad components)...then relate it back to the Riemann tensor...
Aug
19
revised Wick Rotation in Curved space
added 1532 characters in body
Aug
19
answered Wick Rotation in Curved space
Aug
8
revised Lippmann-Schwinger solution
Cleaned up the TeX a little...
Aug
8
suggested suggested edit on Lippmann-Schwinger solution
Aug
6
revised Is it true that the Schrödinger equation only applies to spin-1/2 particles?
added 88 characters in body
Aug
6
answered Is it true that the Schrödinger equation only applies to spin-1/2 particles?
Jul
30
comment Classical Rutherford scattering (partial) derivation
The full text for Rutherford's article is available online, too.
Jul
26
comment How to calculate the 2-point function of gravitons?
Isn't this covered in Feynman's lectures on gravitation?
Jul
26
revised Yang Mills theory and SU(N) groups
Fixed a few typos
Jul
26
suggested suggested edit on Yang Mills theory and SU(N) groups