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math.AP2026

Long-Time Nonlinear Stability of Large-Amplitude Radial Rarefactive Flows for the Multidimensional Compressible Euler Equations

Faris El-Katri

In this paper, we study multidimensional perturbations of radially symmetric rarefactive flows for the compressible Euler equations. No assumptions on the smallness of the backgrou…

math.AP2026

Complex Dynamics of Wave-Character Transitions in Radially Symmetric Isentropic Euler Flows: Theory and Numerics

Eduardo Abreu, Geng Chen, Faris El-Katri +1

We investigate the qualitative dynamics of smooth solutions to the radially symmetric isentropic compressible Euler equations, focusing specifically on the evolution of rarefactive…

math.AP2026

Existence and singularity formation for the supersonic expanding wave of radially symmetric non-isentropic compressible Euler equations

Geng Chen, Faris A. El-Katri, Yanbo Hu

This paper studies the existence and singularity formation of supersonic expanding waves for the radially symmetric non-isentropic compressible Euler equations of polytropic gases.…

math.AP2025

Singularity formation for the supersonic inward wave of compressible Euler equations with radial symmetry

Geng Chen, Faris A. El-Katri, Yanbo Hu +1

In this paper, we consider the singularity formation of smooth solutions for the compressible radially symmetric Euler equations. By applying the characteristic method and the inva…

math.AP2024

Global solution and singularity formation for the supersonic expanding wave of compressible Euler equations with radial symmetry

Geng Chen, Faris A. El-Katri, Yanbo Hu +1

In this paper, we define the rarefaction and compression characters for the supersonic expanding wave of the compressible Euler equations with radial symmetry. Under this new defin…