Finite Speed of Propagation of the Relativistic Landau and Boltzmann Equations

2021 ◽  
Vol 186 (1) ◽  
Author(s):  
Ming-Jiea Lyu ◽  
Baoyan Sun ◽  
Kung-Chien Wu
Keyword(s):  
Boltzmann Equations ◽  
Finite Speed Of Propagation ◽  
Finite Speed ◽  
Speed Of Propagation

scholarly journals Comparison and maximum principles for a class of flux-limited diffusions with external force fields

2016 ◽  
Vol 5 (2) ◽  
Author(s):  
Manh Hong Duong
Keyword(s):  
Maximum Principle ◽  
External Force ◽  
Force Fields ◽  
Gradient Flow ◽  
Strong Maximum Principle ◽  
Maximum Principles ◽  
Finite Speed Of Propagation ◽  
Finite Speed ◽  
Transportation Theory ◽  
Speed Of Propagation

AbstractIn this paper, we are interested in a general equation that has finite speed of propagation compatible with Einstein's theory of special relativity. This equation without external force fields has been derived recently by means of optimal transportation theory. We first provide an argument to incorporate the external force fields. Then, we are concerned with comparison and maximum principles for this equation. We consider both stationary and evolutionary problems. We show that the former satisfies a comparison principle and a strong maximum principle while the latter fulfils weaker ones. The key technique is a transformation that matches well with the gradient flow structure of the equation.

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