On the positive solutions of some nonlinear diffusion problems

1985 ◽  
Vol 36 (4) ◽  
pp. 499-507
Author(s):  
J�rgen Weyer
Keyword(s):  
Positive Solutions ◽  
Nonlinear Diffusion ◽  
Diffusion Problems

scholarly journals Instability of Traveling Pulses in Nonlinear Diffusion-Type Problems and Method to Obtain Bottom-Part Spectrum of Shrödinger Equation with Complicated Potential

2021 ◽  
Author(s):  
Michael I. Tribelsky
Keyword(s):  
Ground State ◽  
Nonlinear Diffusion ◽  
Diffusion Equations ◽  
Nonlinear Diffusion Equations ◽  
Dinger Equation ◽  
Bottom Part ◽  
Diffusion Type ◽  
Traveling Pulses ◽  
General Method ◽  
Diffusion Problems

The instability of traveling pulses in nonlinear diffusion problems is inspected on the example of Gunn domains in semiconductors. Mathematically the problem is reduced to the calculation of the "energy" of the ground state in Schrödinger equation with a complicated potential. A general method to obtain the bottom-part spectrum of such equations based on the approximation of the potential by square wells is proposed and applied. Possible generalization of the approach to other types of nonlinear diffusion equations is discussed.

scholarly journals Approximate solutions to a new class of nonlinear diffusion problems

1999 ◽  
Vol 108 (1-2) ◽  
pp. 219-231 ◽  
Author(s):  
Alberto Cabada ◽  
Juan J. Nieto ◽  
Rodrigo L. Pouso
Keyword(s):  
Nonlinear Diffusion ◽  
Approximate Solutions ◽  
New Class ◽  
Diffusion Problems
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