3 papers
math.AP2026
Global Existence for General Systems of Isentropic Gas Dynamics via a Weighted Pressure Perturbation Approach
Kewang Chen
We establish the global existence of weak entropy solutions for 1D isentropic gas dynamics with general pressure laws (). To address vacuum degeneracy, we introduce a novel s…
math.OC2025
The Dynamical Anatomy of Anderson Acceleration:From Adaptive Momentum to Variable-Mass ODEs
Kewang Chen, Yongqiu Jiang, Kees Vuik
This paper provides a rigorous derivation and analysis of accelerated optimization algorithms through the lens of High-Resolution Ordinary Differential Equations (ODEs). While clas…
math.NA2023
A short report on preconditioned Anderson acceleration method
Kewang Chen, Ye Ji, Matthias Möller +1
In this report, we present a versatile and efficient preconditioned Anderson acceleration (PAA) method for fixed-point iterations. The proposed framework offers flexibility in bala…