A manifestly scale-invariant space-time calculus

1975 ◽  
Vol 28 (1) ◽  
pp. 93-104
Author(s):  
F. S. Klotz
Keyword(s):  
Space Time ◽  
Invariant Space ◽  
Scale Invariant

scholarly journals INTRINSIC AMBIGUITY IN SECOND-ORDER VISCOSITY PARAMETERS IN RELATIVISTIC HYDRODYNAMICS

2012 ◽  
Vol 27 (22) ◽  
pp. 1250125 ◽  
Author(s):  
YU NAKAYAMA
Keyword(s):  
Minkowski Space ◽  
Energy Momentum Tensor ◽  
Momentum Tensor ◽  
Space Time ◽  
Second Order ◽  
Relativistic Hydrodynamics ◽  
Conformal Invariant ◽  
Scale Invariant ◽  
Minkowski Space Time

We show that relativistic hydrodynamics in Minkowski space–time has intrinsic ambiguity in second-order viscosity parameters in the Landau–Lifshitz frame. This stems from the possibility of improvements of energy–momentum tensor. There exist at least two viscosity parameters which can be removed by using this ambiguity in scale invariant hydrodynamics in (1+3) dimension, and seemingly nonconformal hydrodynamic theories can be hiddenly conformal invariant.

scholarly journals Classification of propagation-invariant space-time wave packets in free space: Theory and experiments

2019 ◽  
Vol 99 (2) ◽  
Author(s):  
Murat Yessenov ◽  
Basanta Bhaduri ◽  
H. Esat Kondakci ◽  
Ayman F. Abouraddy
Keyword(s):  
Free Space ◽  
Wave Packets ◽  
Space Time ◽  
Space Theory ◽  
Invariant Space ◽  
Theory And Experiments

Classification of Propagation-Invariant Space-Time Wave Packets in Free-Space

2018 ◽  
Author(s):  
Basanta Bhaduri ◽  
Murat Yessenov ◽  
H. Esat Kondakci ◽  
Ayman F. Abouraddy
Keyword(s):  
Free Space ◽  
Wave Packets ◽  
Space Time ◽  
Invariant Space

scholarly journals Bijective model of time and J.T. Fraser’s Nowless Universe

2020 ◽  
Author(s):  
Amrit S. Sorli
Keyword(s):  
Physical Reality ◽  
Space Time ◽  
Invariant Space ◽  
Bijective Function ◽  
Time Invariant ◽  
System Entropy

In bijective modelling, the physical reality is represented by the set X, the model of physical reality by the set Y. Every element in the set X has exactly one correspondent element in the set Y. Set X and set X are related by the bijective function f:X→Y. Bijective modelling is confirming that time is the duration of given system entropy increasing in time-invariant space. Time-invariant space is the fundamental arena of the Nowless Universe.

ALTERNATIVE PERSPECTIVES AND THE INVARIANT SPACE-TIME

Mind ◽  
1934 ◽  
Vol XLIII (170) ◽  
pp. 199-203
Author(s):  
A. USHENKO
Keyword(s):  
Space Time ◽  
Invariant Space
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