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Topic: closed universe, flat space?
Replies: 48   Last Post: May 5, 2013 2:45 PM

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dan.ms.chaos@gmail.com

Posts: 409
Registered: 3/1/08
Re: closed universe, flat space?
Posted: Apr 25, 2013 2:50 PM
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> There is still no mathematical proof showing that null Ricci tensor
> with non-vanishing Riemann tensor.  Even if you are right, Riemann
> tensor does not play a role in the final interpretation of
> differential geometry.  The Riemann tensor represents only one of the
> steps from the Christoffel symbols to the field equations.  <shrug>


http://sgovindarajan.wikidot.com/ricciflatmetrics


> Koobee Wublee is also very amazed that the solutions to the FLRW
> metric would be interpreted as expansion of space while the
> Schwarzschild metric would be interpreted as the geometry that
> determines how an object is going to behave --- same mechanism in
> mathematics but interpreted in two drastically different ways.  If
> there is not enough or no negative mass density in vacuum, Koobee
> Wublee supposes space would collapse back onto itself dragging all
> objects in space along with it, no?  So much for the scientific axiom
> that the laws of physics are the same everywhere and whenever.
> <shrug>


I have no idea what you're talking about . And I'm pretty sure you
have no idea what you're talking about .
"Spacetime tells matter how to move; matter tells spacetime how to
curve" -John Archibald Wheeler

>So, the flatness of cosmology is determined through how much of
>negative mass density is in vacuum. If there is more negative mass in
>vacuum, the universe will expand its acceleration just like
>antigravity of the Newtonian system. Koobee Wublee find that very
>amazing that the self-styled physicists would choose to embrace
>negative mass density in vacuum while vehemently denying the Aether.
><shrug>


Ether isn't needed in General relativity . It's a deterministic theory
where you have no arrow of time apart from the expansion of the
universe. Like a 3d holographic movie. It doesn't matter how you play
it or view it . An object moving at constant velocity can consider
itself at rest . Whether or not any notion of 'absolute space' of
'absolute time' will be needed in a unified theory is beyond the scope
of this discussion .

> No, Koobee Wublee cannot generalize an ordinary 3-dimensional object
> with the profoundness of curved space where space is able to curve
> back onto itself.  Please present the metric.  <shrug>



Here's the metric for a 3-sphere . Add an additional time dimension
(an extra row and column in the metric tensor with -1 in the corner
and zero in the other entries ) and you're ready to calculate
trajectories .
http://upload.wikimedia.org/math/5/d/3/5d3493e432ad0bdab4e10a3896368856.png

> ?All science came out of a sea of irrational speculations plus a tiny
> trace of rational one, but scientific methods when properly applied
> allow science to find just that rational one.  <shrug>?
> --- Koobee Wublee, 2013


What methods count as 'scientific'?
Also ,you had to find the most reliable source to quote , right? And
you call me a 'self-styled physicists' . You're not deserving of the
title, however , you do qualify for hypocrite .

> It is amazing that you certainly have spent a lot of energy engaging
> with the point you have claimed not to see.  <shrug>


It's always worthwhile to see if meaningful dialogue and understanding
can be achieved . Since, in the present case , it is impossible, rest
assured that I won't repeat the same mistake , and not waste any more
energy .



Date Subject Author
4/23/13
Read closed universe, flat space?
Rich Delaney
4/23/13
Read Re: closed universe, flat space?
Poutnik
4/24/13
Read Re: closed universe, flat space?
Shmuel (Seymour J.) Metz
4/29/13
Read Re: closed universe, flat space?
Rich Delaney
4/23/13
Read Re: closed universe, flat space?
kenseto
4/24/13
Read Re: closed universe, flat space?
JT
4/24/13
Read Re: closed universe, flat space?
herbert glazier
4/24/13
Read Re: closed universe, flat space?
Double-A
4/23/13
Read Re: closed universe, flat space?
Nicolas Bonneel
4/29/13
Read Re: closed universe, flat space?
Rich Delaney
4/29/13
Read Re: closed universe, flat space?
Mike Terry
4/23/13
Read Re: closed universe, flat space?
xxein
4/23/13
Read Re: closed universe, flat space?
Brian Q. Hutchings
4/23/13
Read Re: closed universe, flat space?
Butch Malahide
4/23/13
Read Re: closed universe, flat space?
Newberry
4/24/13
Read Re: closed universe, flat space?
Koobee Wublee
4/24/13
Read Re: closed universe, flat space?
dan.ms.chaos@gmail.com
4/24/13
Read Re: closed universe, flat space?
Koobee Wublee
4/24/13
Read space is locally curved, as has been measured
Brian Q. Hutchings
4/25/13
Read Re: closed universe, flat space?
dan.ms.chaos@gmail.com
4/25/13
Read Re: closed universe, flat space?
herbert glazier
4/25/13
Read Re: closed universe, flat space?
dan.ms.chaos@gmail.com
4/25/13
Read Re: closed universe, flat space?
bradguth@gmail.com
4/27/13
Read Re: closed universe, flat space?
Brian Q. Hutchings
5/4/13
Read Re: closed universe, flat space?
bradguth@gmail.com
5/5/13
Read Re: closed universe, flat space?
Brian Q. Hutchings
4/25/13
Read Re: closed universe, flat space?
Koobee Wublee
4/25/13
Read Re: closed universe, flat space?
dan.ms.chaos@gmail.com
4/25/13
Read Re: closed universe, flat space?
Koobee Wublee
4/25/13
Read closed universe, flat space, ignore Minkowski's worse nD geometry;
thank you
Brian Q. Hutchings
4/26/13
Read Re: closed universe, flat space, ignore Minkowski's worse nD
geometry; thank you
Brian Q. Hutchings
4/27/13
Read curved space and/or curved time (time is the "real, scalar" part of
vector mechanics -- like a God-am clock
Brian Q. Hutchings
4/27/13
Read Re: curved space and/or curved time (time is the "real, scalar" part
of vector mechanics -- like a God-am clock
Brian Q. Hutchings
4/27/13
Read Re: closed universe, flat space?
Tom Roberts
4/27/13
Read Re: closed universe, flat space?
Koobee Wublee
4/27/13
Read Re: closed universe, flat space?
Brian Q. Hutchings
4/29/13
Read Re: closed universe, flat space?
Rich Delaney
4/29/13
Read Re: closed universe, flat space?
dan.ms.chaos@gmail.com
4/29/13
Read Re: closed universe, flat space?
Koobee Wublee
4/30/13
Read Kepler uncovered the curvature via his three orbital constraints
(reciprocal of diameter)
Brian Q. Hutchings
4/30/13
Read Minkowski was an otherwise-great geometer!
Brian Q. Hutchings
5/1/13
Read Minkowski, Minkowski, Minkowski -- say it, againsville
Brian Q. Hutchings
5/1/13
Read Kepler's cosmological curvature thingies
Brian Q. Hutchings
5/3/13
Read Re: closed universe, flat space?
Rich Delaney
5/4/13
Read Re: closed universe, flat space?
dan.ms.chaos@gmail.com
5/4/13
Read Re: closed universe, flat space?
dan.ms.chaos@gmail.com
5/4/13
Read Re: closed universe, flat space?
dan.ms.chaos@gmail.com
5/5/13
Read Re: closed universe, flat space?
Koobee Wublee
5/5/13
Read eight to the bar -- Daddy!
Brian Q. Hutchings

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