Power law singularities in orthogonal spatially homogeneous cosmologies

1984 ◽  
Vol 16 (7) ◽  
pp. 657-674 ◽  
Author(s):  
J. Wainwright
Keyword(s):  
Power Law ◽  
Spatially Homogeneous ◽  
Homogeneous Cosmologies

scholarly journals Two Bianchi type VIII spatially homogeneous cosmologies

1977 ◽  
Vol 52 (1) ◽  
pp. 1-10 ◽  
Author(s):  
J. G. Miller
Keyword(s):  
Bianchi Type ◽  
Type Viii ◽  
Spatially Homogeneous ◽  
Homogeneous Cosmologies

Exact spatially homogeneous cosmologies

1980 ◽  
Vol 12 (10) ◽  
pp. 805-823 ◽  
Author(s):  
C. B. Collins ◽  
E. N. Glass ◽  
D. A. Wilkinson
Keyword(s):  
Spatially Homogeneous ◽  
Homogeneous Cosmologies

Nonscalar singularities in spatially homogeneous cosmologies

1981 ◽  
Vol 13 (5) ◽  
pp. 433-441 ◽  
Author(s):  
S. T. C. Siklos
Keyword(s):  
Spatially Homogeneous ◽  
Homogeneous Cosmologies

scholarly journals SUPERSYMMETRIC QUANTUM COSMOLOGY FOR BIANCHI CLASS A MODELS

1998 ◽  
Vol 07 (05) ◽  
pp. 701-712 ◽  
Author(s):  
ALFREDO MACÍAS ◽  
ECKEHARD W. MIELKE ◽  
JOSÉ SOCORRO
Keyword(s):  
Wave Function ◽  
Quantum Cosmology ◽  
Rest Frame ◽  
Matrix Representation ◽  
Canonical Theory ◽  
Class A ◽  
Spatially Homogeneous ◽  
The Universe ◽  
Homogeneous Cosmologies

The canonical theory of [Formula: see text] supergravity, with a matrix representation for the gravitino covector–spinor, is applied to the Bianchi class A spatially homogeneous cosmologies. The full Lorentz constraint and its implications for the wave function of the universe are analyzed in detail. We found that in this model no physical states other than the trivial "rest frame" type occur.

scholarly journals On the predictability of ice avalanches

2005 ◽  
Vol 12 (6) ◽  
pp. 849-861 ◽  
Author(s):  
A. Pralong ◽  
C. Birrer ◽  
W. A. Stahel ◽  
M. Funk
Keyword(s):  
Power Law ◽  
Time Window ◽  
Regression Method ◽  
Linear Regression Method ◽  
Time Singularity ◽  
Periodic Oscillations ◽  
Power Law Function ◽  
Spatially Homogeneous ◽  
Finite Time Singularity ◽  
Time Of Failure

Abstract. The velocity of unstable large ice masses from hanging glaciers increases as a power-law function of time prior to failure. This characteristic acceleration presents a finite-time singularity at the theoretical time of failure and can be used to forecast the time of glacier collapse. However, the non-linearity of the power-law function makes the prediction difficult. The effects of the non-linearity on the predictability of a failure are analyzed using a non-linear regression method. Predictability strongly depends on the time window when the measurements are performed. Log-periodic oscillations have been observed to be superimposed on the motion of large unstable ice masses. The value of their amplitude, frequency and phase are observed to be spatially homogeneous over the whole unstable ice mass. Inclusion of a respective term in the function describing the acceleration of unstable ice masses greatly increases the accuracy of the prediction.

Singularities in spatially homogeneous cosmologies

1979 ◽  
Vol 10 (12) ◽  
pp. 1013-1019
Author(s):  
G. F. R. Ellis
Keyword(s):  
Spatially Homogeneous ◽  
Homogeneous Cosmologies

Using EXCALC to study nondiagonal multidimensional spatially homogeneous cosmologies

1988 ◽  
Vol 20 (11) ◽  
pp. 1127-1139 ◽  
Author(s):  
Y. De Rop ◽  
J. Demaret
Keyword(s):  
Spatially Homogeneous ◽  
Homogeneous Cosmologies

Type I, II, and III spatially homogeneous cosmologies with electromagnetic field

1980 ◽  
Vol 235 ◽  
pp. 307 ◽  
Author(s):  
K. A. Dunn ◽  
B. O. J. Tupper
Keyword(s):  
Electromagnetic Field ◽  
Type I ◽  
Spatially Homogeneous ◽  
Homogeneous Cosmologies
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