Recent content by Sagar_C

I am little confused about the right place to ask this question but anyway here it goes: How can one convince oneself that (if at all it is true) chaotic attractors always are fractals? Thanks in advance. P.S.: Little bit of googling suggested that there are examples of non-strange chaotic...

Thanks. The pdf is just right for a layman like me.

Thanks. But this logic confuses me because galaxies are gravitationally bound in a galaxy cluster and then what?

Is the Earth moving away from the moon (however tiny amount it may be) due to expansion of the universe? Or is Hubble's law applicable to only to gravitationally-UNbound object?

Thanks. Just to double-check, so I can treat (c-d sech^2(x))y as the non-homogeneous part even though it contains y? I actually knew how to solve it (as particular solution) when y is absent but not when y is present. :(

Is there any general method to solve the following linear equation: [ D^6+a D^4+b D^2+(c-d sech^2(x))] y=0? Here, D=d/dx and a,b,c,d are constants.

How does one analytically estimate star formation rate in a plasma cloud? Could someone lead me to original references? Kennicutt-Schmidt Law, I guess, is empirical.

Thanks. I have done some internet search already. I am looking for something "analytical".

How does one analytically estimate star formation rate in a plasma cloud? Could someone lead me to original references?

Landau's book defines it as thermal conductivity/density/specific heat at constant pressure while Chandrasekhar's book defines it as thermal conductivity/density/specific heat at constant volume. I am confused. Any comments?

Edited: Wrong post! Sorry!

Many thanks. Actually, I should have been more specific. What I am really confused with is how covariant derivative appeared. The source of my confusion is that earlier in the text it seemed to be defined that "d/d\tau" is for simple derivative (see attachment 1) and "D/d\tau" is for the...

I am not very used to jugglery of tensors...I am learning it all now-a-days...I am trying to read a paper...and stuck at a point..:( ...It will be of great help if someone could help me get at eqn (34) from eqn (32) (cf. attached.) d/d\tau=u^\alpha\partial_\alpha (I think) and semi-colon is for...

I thought so but somehow couldn't find. :(...Would you have some time to lead to those? Edited to add: I found one: https://www.physicsforums.com/showthread.php?t=65767 . Any other would be appreciated.

An accelerated charge particle radiates. So, in the light of principle of equivalence, does a charge particle also radiate when it is in a gravitational field? Sorry if the question doesn't make any sense.