865 reputation
114
bio website joshphysics.com
location Los Angeles
age 28
visits member for 1 year, 8 months
seen 1 hour ago

New project: phermi.com

Let me know if you know of any hard physics problems with clever solutions. (email listed to the left)

Personal website: joshphysics.com

Currently a visiting lecturer at the UCLA Department of Physics and Astronomy.

Ph.D. theoretical high energy physics from UCLA.

BA/BS in physics/math respectively from UC Berkeley.


1d
comment How are eigenvectors/eigenvalues and differential equations connected?
Shouldn't $e^{\lambda y}$ read something like $e^{\lambda t}$ instead?
Sep
10
awarded  Revival
Sep
4
comment How to calculate this functional derivative?
@Trimok Thanks; edited.
Sep
4
answered How to calculate this functional derivative?
Aug
3
comment What is the probability of being in a “run” of length $k$?
Thanks. This agrees with the expression I wrote it seems since $\sum_j j 2^{-j} = 2$.
Aug
3
accepted What is the probability of being in a “run” of length $k$?
Aug
2
asked What is the probability of being in a “run” of length $k$?
Jul
18
accepted Limit of a sequence of determinants.
Jul
2
awarded  Curious
Jun
29
revised Special conformal killing fields - solving for integral curves.
deleted 28 characters in body
Jun
28
revised Special conformal killing fields - solving for integral curves.
deleted 11 characters in body
Jun
28
revised Special conformal killing fields - solving for integral curves.
added 322 characters in body
Jun
28
comment Special conformal killing fields - solving for integral curves.
@HansLundmark Very slick; thanks.
Jun
28
comment Special conformal killing fields - solving for integral curves.
@Kirill I found where I went wrong; I hadn't originally simply directly computed $\dot y$, so I had obtained the identity $y\cdot(\dot y + b)$ which is of course still true but not what we want. I hope you don't mind if I post my own answer as well and perhaps accept it since it's a bit simpler? Thanks so much for your help!
Jun
28
comment Special conformal killing fields - solving for integral curves.
@Kirill I probably made an error, let me check my algebra.
Jun
28
comment Special conformal killing fields - solving for integral curves.
@Kirill Agreed, but how does one solve the equation at the end for $x$?
Jun
28
comment Special conformal killing fields - solving for integral curves.
Wow, bravo for all this effort. The crazy thing is that I saw this exactly at the same time that I think I've almost figured out a really tricky way to do this. See my edit to the question (the Progress! section) I'll read through this as well. Thanks again.
Jun
28
revised Special conformal killing fields - solving for integral curves.
added 652 characters in body
Jun
28
revised Special conformal killing fields - solving for integral curves.
added 408 characters in body
Jun
27
asked Special conformal killing fields - solving for integral curves.