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3h
comment Why are significant figure rules in Multiplication/Division different than in Addition/Subtraction?
@Procyon Actually, I don't remember exactly what I meant by that. I think I'll take it out.
1d
comment Solving Schrodinger's Equation in Bunimovich Stadium Boundary Condition
Nooooo, we're too late! :-P @ScubaDiving it's usually better to let the question be migrated automatically, but it doesn't really matter that much. I'm closing this here as it is now on another site. That being said, it's not clear to me what part exactly you're having trouble, and depending on what that is, it's possible this could have been on topic here.
2d
comment modern exposition of exact ground state of classical XY model or Ising model
I'm voting to close this question as a marker that it has been cross-posted to MathOverflow.
Apr
27
comment Are units of angle really dimensionless?
@Brian Let me see if I can work that in. I think it would be a useful addition.
Apr
26
comment An explanation of Hawking Radiation
Comments are not for extended discussion; this conversation has been moved to chat.
Apr
26
comment Injectivity of Physical Functions
I've deleted some comments which should have been answers. Please keep in mind that comments are not to be used for answering the question.
Apr
26
comment How can an electron fake a jet?
Yes, I would prefer that. Personally, I would retype it, but if you're not willing to do that, the funny lines are at least better than including an image. Make sure to use quote blocks as appropriate.
Apr
26
comment How can an electron fake a jet?
Because it's not searchable, not usable by screen readers, not machine-parseable, not available offline or in the data dump, subject to change without notification, and it doesn't give browsers the ability to change the rendering. Among other reasons, probably. It's been at least an informal rule for a long time that people shouldn't post images of text, but if it's not officially written anywhere I guess we should fix that.
Apr
26
comment How can an electron fake a jet?
You know, you really shouldn't post images with text in them.
Apr
26
comment How does Zumberge's 1981 gravitational measurements relate to gravitational waves?
Comments are not for extended discussion; this conversation has been moved to chat.
Apr
26
comment Two-point function of a free massless scalar field in Euclidean space-time
Comments are not for extended discussion; this conversation has been moved to chat.
Apr
26
comment A doubt regarding Black Hole Complementarity
That's not a suggestion for improvement.
Apr
26
comment A doubt regarding Black Hole Complementarity
I've removed a nonconstructive comment discussion. Please keep in mind that comments are meant for suggesting improvements and requesting clarification.
Apr
26
comment What does $(\delta\vec{r}\cdot\nabla)^2$ mean in the derivation of the Lamb shift, and how do you find its expectation?
Think of doing a limiting process, where you have some finite shift $\delta x$ and at each step you make it smaller and smaller. Imagine doing this at different values of $x$. Would you have to use different shifts for different values of $x$ at the same step of the limiting process? You probably can't come up with any reason to do so, and you'd be right: there is no reason to change $\delta x$ depending on $x$. Thus it's effectively a constant. In other, more complicated cases, there could be some reason to do so.
Apr
25
comment When only part of the surface an object is in contact with has friction, what is the normal force I should use?
A note to prospective close voters: the conceptual question here is in the last two sentences.
Apr
25
comment What does $(\delta\vec{r}\cdot\nabla)^2$ mean in the derivation of the Lamb shift, and how do you find its expectation?
Consider this, though: does $\delta x$ depend on $x$?
Apr
24
comment Don't all waves transport mass?
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Apr
23
comment Don't all waves transport mass?
Comments are not for extended discussion; this conversation has been moved to chat.
Apr
23
comment Is this analogy of Hawking Radiation correct?
Comments are not for extended discussion; this conversation has been moved to chat.
Apr
23
comment What's the probability distribution of a deterministic signal or how to marginalize dynamical systems?
I'm not sure if this is on topic here, and same goes for your other question. If so, Signal Processing might be a better choice. But we generally prefer you don't post the same question on multiple SE sites. If the question is off topic here, perhaps we can migrate it to DSP.