Recent content by sri sharan

No, Its not a higher dimensional plane whatever you may mean by that. It is just a mathematical technique in which you write it is a function of s

Thanks for that Dave, the bullet cluster observation is very convincing.On a side note, has anyone worked on a modified gravity theory to explain this(although I guess that they would have to invoke gravity at skewed angles, it doesn't really sound elegant)

For example...

Sorry if this has already been discussed. I just couldn't find it. So the main proof for dark matter comes from the anomalies of the gravitational interaction between galaxies and not being able to explain the near constant velocities of the rotating stars observed in a galaxy, independent of...

yeah, that's what I did. And thanks of the the De Sitter info . Didnt know about that before

Hmm, isn't that more like the fate of the universe. What I was trying to calculate was what would be the present age of the universe in standard Friedman cosmology for a flat universe(sorry i didn't mention that before), as a function of the observed CMB redshift and Hubble. But what I got was...

The other day, I was calculating the age of universe dominated by vacuum energy and it turned out to be infinity. What does age of the universe being infinite mean? On explanation I thought of is that may be this implies that such a universe has no beginning. Is it a proper explanation?

Hmm, ok this makes sense.Now everything is clear

http://nolaymanleftbehind.wordpress.com/2011/07/13/the-difference-between-impossible-and-zero-probability/ Have a look at this!

Ok that cleared up things a bit, but I still can't find an exact quantitative definition of what zero probability means,not in that article nor any where else on the net.Can some one provide a definition of the same

But that is just our practical inability of picking a complete random number. That can't inhibit the mathematics.

Ok all this is totally confusing and not clarifying anything. Can anyone give a meaning of what zero probability means when continuous variables and probability densities are involved

I didn't doubt that before. what I actually meant was that my definition of zero probability as an impossible event might be wrong.I feel a more subtle and precise definition might exist which will account for this here.My apologies if I have not been clear before.

A probability of zero for an event says that it is impossible right?Then let's say that I need to choose a number randomly among the infinite numbers between 2 and 5.The probability of picking a particular number should be zero.And yet i can pick a number randomly(whose probobility of being...

yes, I see it now