On 7/31/05, Russell Standish <[EMAIL PROTECTED]> wrote:
> On Sat, Jul 30, 2005 at 12:25:48PM -0700, Lee Corbin wrote:
> > This is not to say that progress is impossible. Consider an idea
> > like Aditya has: what is the real difference between an event
> > and an observer-moment? In trying to answer that question, many
> > of us may learn something (at least for our own purposes).
> Err, an event is a particular set of coordinates (t,x,y,z) in 4D
> spacetime. This is how it is used in GR, anyway.
> An observer moment is a set of constraints, or equivalently
> information known about the world (obviously at a moment of time). It
> corresponds the the "state" vector \psi of quantum mechanics.
> Perhaps you have different definitions of these terms, but it seems
> like chalk and cheese to me.
Lets not constrain an "event" to mean something only in 4-space. Take
any N-Space and you can define it in terms of a set of N-dim. events.
Ofcourse I agree with your definition, am just making it scale over
Now consider an "observer moment" to be exactly what you are defining
it to be: information KNOWN about the world at a moment of time. The
"coming to know" of any information corresponds to an "event". Thus an
"observer moment" is well-defined if and only if "event" is defined.
In other words, an Observer-Moment exists iff it's corresponding
"coming to know" event exists for "some" observer. In terms of light
cones, OMs are the Events at and "after" the crossing over of light
I think the distinction is not a qualitative one between the two, only
those events which interfere with the set of events "observable" by
"us" (who are also just sets of events) correspond to
"observer-moments" in "our universe". So the set of OMs is simply a
subset of the set of all events.
refer to my previous mail about the multiverse as a partition with
equivalence classes which are maximal sets of connected "observer
moments", in other words, maximal sets of "mutually interfering
events". visualize this as connected components of a graph.
Defining entities in more than one different sets of words does not
rule out their qualitative identity. Every Observer-Moment is an
event. Every event is an Observer-Moment in some universe.
Aditya Varun Chadha
adichad AT gmail.com