Re: Which universe are we in?

2002-07-09 Thread scerir
> There is a sense in which the past is not unique and determined. > [..] the "single past" model is quite well-supported by science [.] It seems that the quantum measurement traces a certain (consistent) history, takes a part in the very formation of the past (of that history). John Wh

Re: Some books on category and topos theory

2002-07-09 Thread Tim May
On Tuesday, July 9, 2002, at 11:08 AM, Bruno Marchal wrote: > > Me too. Now, I feel almost like you about ... knot theory. > And this fit well with your cat-enthusiasm, for knot theory is > a reservoir of beautiful and TOE-relevant categories > (the monoidal one). I've just > ordered Yetter's bo

Re: Some books on category and topos theory

2002-07-09 Thread Bruno Marchal
At 9:24 -0700 9/07/2002, Tim May wrote: >Reading styles differ, but I have come to favor the "hawk spiral." I >see hawks spiralling in the thermals near my house, and this is how >I like to learn. I read something from one book, think, read from >another, think, try to compare what the authors

Fwd: Which universe are we in?

2002-07-09 Thread Tim May
Apologies. I accidentally sent this last night to another mailing list. Here it is. --Tim Begin forwarded message: > > On Monday, July 8, 2002, at 07:43 PM, Stephen Paul King wrote: > >> Dear Tim, >> >> Are you tacitly assuming some kind of communication between >> observers >> when you m

Re: Some books on category and topos theory

2002-07-09 Thread Tim May
On Tuesday, July 9, 2002, at 07:41 AM, Bruno Marchal wrote: > > Tim makes a very genuine remark (but he writes so much I fear that has > been unnoticed!). True enough...I write a lot! (The old joke applies: "I don't have enough time to write a short letter.") > He said: read Tegmark (Everyt

Re: being inside a universe

2002-07-09 Thread Bruno Marchal
One more thing. At 22:19 -0700 8/07/2002, Wei Dai wrote: >First I question the necessity of defining that average. Do you agree that in QM (and in any TOE QM-based), there *is* an average. Do you agree that QM is a sort of (non commutative) *measure* theory? Do you accept QM? Are you following S

Re: being inside a universe

2002-07-09 Thread Bruno Marchal
At 22:19 -0700 8/07/2002, Wei Dai wrote: >Bruno, unfortunately I'm not able to write very quickly. I hope you don't >mind if I just respond to some of the topics I think are most important. >Feel free to recall the other ones later if you think I'm missing >something crucial. > >On Mon, Jul 08, 20

Re: Some books on category and topos theory

2002-07-09 Thread Bruno Marchal
Wei Dai asks some question to Tim May which I would like to comment taking into account some other posts. Wei Dai: >Suppose I had the time for only one book, which would you recommend? I think you (Wei) decide to look for the book by Lawvere. Good choice but you should know it is just an intro

RE: "Morality" in a Block Multiverse

2002-07-09 Thread Bruno Marchal
Scott W. Somerville wrote: >Rodolfo writes, "There are no hints of predestination." > >By the term "block multiverse" I mean a reality in which everything >MUST happen, in some "timeline" or "universe." This sounds a lot like >predestination to me. > >Scott W. Somerville, Esq. >[EMAIL PROTECTED