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Feb
28
comment Bessel function confirmation
I totally missed that, thank you very much.
Feb
28
revised Bessel function confirmation
typo
Feb
28
asked Bessel function confirmation
Feb
27
accepted What's a singular differential equation?
Feb
27
comment What's a singular differential equation?
Thank you for your answer.
Feb
27
comment What's a singular differential equation?
@5pm I think I confused to different related questions I made. Thank you anyways.
Feb
27
comment What's a singular differential equation?
@5pm Really? Approximations for large distances give you amplitudes of the form $1/\sqrt(r)$, which diverges at $0$. Should I not assume similar behaviour for the bessel function?
Feb
27
comment What's a singular differential equation?
@5pm So I have to know the solution, or at least if it diverges in the origin (or is singular), before being able solve it?
Feb
27
comment What's a singular differential equation?
@5pm Then if the term of the second derivative is $x^2y_{xx}$, is it always singular? For example here: mathworld.wolfram.com/BesselFunctionoftheFirstKind.html the first term is like that and they say: "which are non-singular at the origin".
Feb
27
asked What's a singular differential equation?
Feb
27
comment Variable change in this partial differential equation
@Kaster Ok thanks.
Feb
27
asked Variable change in this partial differential equation
Feb
26
comment Dimension of a space
@julien ok.....
Feb
26
comment Dimension of a space
@julien That's the teqhnical name. In $\mathbb{R}^3$, the vectors $(1,0,0),(0,1,0),(0,0,1),(1,1,0)$ generate the space, but they're not "our" minimal basis because you can remove one of the vector and still have a basis.
Feb
26
comment Dimension of a space
Where can I see a proof of $c^{\aleph_0}=c$?
Feb
26
comment Dimension of a space
@julien It maybe a mistraslation from spanish, I translated it literally and probably the english word is different: it's a base that generates the full space, but whose members are linearly independent.
Feb
26
revised Dimension of a space
deleted 9 characters in body
Feb
26
comment Dimension of a space
@TobiasKildetoft That was actually added by me under complete ignorance. I deleted it.
Feb
26
comment Dimension of a space
@TobiasKildetoft Could you please develop that answer. I'm very interested in it. I just don't get that equality.
Feb
26
asked Dimension of a space