Thanks for such an interesting link.
That said, I have some random comments.
Something bothers me about the attitude hidden in there....as if I can't "get" some of this stuff because I don't know how to do the math.
I have an aquaintance who is entering grad school in California in the fall to study string theory. He had a double major in math and physics in college. The part about the mathematicians "got" Sirag's work but the physicists didn't makes sense. I get the impression if you can do the math, the physics is a breeze.My aquaintance once innocently mentioned that a quantum mechanics course he was taking wasn't difficult...if you know how to do vectors...
But the power of the physics is that the assumptions in the math are tied to ...how do we talk about this now..."real" ....physical...3-D/4-D phenomena, and predict results in the "real" world. Mathematicians aren't so constrained and I wonder what that means.
Sirag says.."the whole history of physics has been really the pursuit of unifying forces of nature." What??? Honey, the forces are already unified! You are just describing them. Or are you creating something new???
"James Clerk Maxwell unified electricity and magnetism and light into one single theory, so he was unifying three very different things -- " What??? Maxwell merely discovered that they could be described in terms of each other.
There is a certain conceit at work here.
Yes I know he goes on to say other things, but the conceit is there in the way he words things.
The basic idea that 4-D place we call home is a subset of multidimensional space is OK with me. But lots of folks have not had to know that in order to explore other dimensions. I guess the gift from physics is that it is creating a language where we can talk about this, and in this culture, if we invoke physics we give it legitimacy.
But you don't have to know the math to explore hyperspace, any more than you have to know how an engine works in order to drive to the grocery store.
This site does not carry enough of those adventures into hyperspace and does get off on tangents into created mental hyperspaces (I think religion is an invention, but Blake [my Eddington] already said that) that don't do anything to take us further.
Since you've been away for a while you might not have seen the posts by Dave at this link; you might (or might not!) find them interesting:
http://www.afterlife-knowledge.com/cgi-afterlife-knowledge/yabb/YaBB.cgi?board=a...I'm glad you posted this link because I think this is an interesting conversation. Maybe I will send this link to my string theory aquaintane. He is not interested in using quantum mechanics to describe the mind. Yet.
I do wonder, in quiet moments of cosmological contemplation, what it means that the mathematics..obviously a subset of hyperspace, an invention of the mind that exists in 4-D space and dependent on language formation...can be used to describe hyperspace or anything else. what does that mean???