Recent content by geshel

Yeah, should have looked it up before posting. I also misquoted it. The proposed value is twice what I wrote above, however looking at the paper again quickly there is something I'm missing. Anyway here is the paper: http://www.lsv.fr/~dowek/Publi/planck.pdf

There is also a paper out there suggesting a new reference unit, instead of the Planck length. Such that an area of one such square unit has a limit of one bit. The linear unit is $$\frac{l_p}{\sqrt{\ln(2)}}$$

The basis in that reference is the natural logarithm. For the equivalent in bits, see the introduction to Bousso’s The Holographic Principle here: https://arxiv.org/abs/hep-th/0203101

Event C is in event A’s observable universe. “Location” C is not in “location” A’s observable universe at the ill-defined “when the influence left C”.

For me, the more interesting point is that the 3rd and higher derivatives never show up anywhere important.

Think in terms of events, not just location. An event outside of your light cone may “have already” influenced something within your light cone, but you can’t see any evidence of that until the light from that intermediate point reaches you. By this time, ignoring the expansion of space, the...

Not really, because it depends on the initial size of the black hole.

Thanks for the clarification PeterDonis.

Sorry I don't know anything about that equation yet.

I believe the area of the BH must grow by at least the amount equivalent to the entropy of the stuff added. However, it most likely grows by much more than that. A BH of a certain mass has an area corresponding to the maximum entropy such a mass could have (this is for a simple Schwarzschild -...

http://www.gregegan.net/DICHRONAUTS/00/DPDM.html Second time in the past week I've linked to Egan's Dichronauts regarding questions about "two time dimensions"!