892 reputation
115
bio website joshphysics.com
location Los Angeles
age 28
visits member for 1 year, 11 months
seen yesterday

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 lecturer at the UCLA Department of Physics and Astronomy.

Ph.D. theoretical high energy physics, UCLA.

BA/BS in physics/math, UC Berkeley.


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.
Jun
4
comment Big O notation for complex-valued functions of a real variable
@TedShifrin Thank you.
Jun
4
asked Big O notation for complex-valued functions of a real variable
Mar
28
revised What extra assumption makes this transformation affine?
edited tags
Mar
28
comment What extra assumption makes this transformation affine?
@Rahul Ok thanks for the insight.
Mar
28
comment What extra assumption makes this transformation affine?
@Rahul Ah thanks! Does one need to restrict the field over which $V$ is defined?
Mar
28
comment What extra assumption makes this transformation affine?
@BISHD Great! One might think that such curiosity would warrant an upvote ;) ? Thanks for the edits btw.
Mar
28
awarded  Custodian
Mar
28
reviewed Approve What extra assumption makes this transformation affine?
Mar
28
comment What extra assumption makes this transformation affine?
@BISHD lol ok. I had hoped what I was asking was clear from the context, but I agree it's not entirely clear, so I changed the wording to "how weak one can make additional assumptions." How's that?
Mar
28
revised What extra assumption makes this transformation affine?
added 15 characters in body
Mar
28
comment What extra assumption makes this transformation affine?
@BISHD Yes I understand that. I am not assuming that $f$ is linear.