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Eric Weinstein & Dan Green: Can New Physics Be Tested? (#299)
Into the Impossible With Brian Keating
The Singularity of Time in the Standard Friedman-Robertson Walker Model
If Albert Einstein told us to embrace semi-romani in geometry, it's not simply four degrees of freedom together with one set of rulers and four rulers for each degree of freedom. And only R1 has an ordering in the absence of other structure. R2, R3, R4 don't have such a thing. So when there is an arrow of time, it makes good sense, ordinarily, to say nothing of cardinality, to speak of before. But if the ultimate structure, as I believe, has multiple dimensions of time, you will find that the crotch of saying initial conditions has to be replaced by something like boundary conditions.
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