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math.AP2026
Explicit form of relaxation tensor for isotropic extended Burgers model and its spectral inversion
Youjun Deng, Ching-Lung Lin, Gen Nakamura
Concerning the anelastic nature of Earth, the quasi-static extended Burgers model (abbreviated by q-EBM), an integro-differential system, is used to study the free oscillation of E…
math.AP2026
Inverse Spectral Problem With Low Regularity Refractive Index
Kewen Bu, Youjun Deng, Yan Jiang +1
This article investigates the unique determination of a radial refractive index n from spectral data. First, we demonstrate that for piecewise twice continuously differentiable fun…
math.AP2025
Clustered eigenvalue problem for glassy state relaxation and its inverse problem
Shuli Chen, Maarten V. de Hoop, Youjun Deng +2
For computational convenience, a Prony series approximation of the stretched exponential relaxation function of homogeneous glasses has been proposed (J. Mauro, Y. Mauro, 2018), wh…