In his "No Boundary Conditions", is Hawking stating that time is eternal?
And what is the difference between Real Time and Imaginary Time?
Is he saying there are two different arrows of time, and our universe began as a singularity on one of those arrows, while the other arrow already existed independently of the other?
I've also read about a theory that proposes our universe might have two separate time dimensions. Can someone elaborate?
closed as too broad by Danu, user36790, John Rennie, honeste_vivere, ACuriousMind♦ Jun 8 '16 at 16:11
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The noboundary condition means there is no boundary that marks the end of space or time. With respect to time one might think of the lines of longitude on a globe as representing the time direction at different point in a spatial manifold modeled as the lines of latitude. As one looks further to the north, which is the big bang that eventually you look north of the north pole. From a physics perspective it means the state of the universe was not determined by any special boundary conditions, but by topology.