Chuan-Fu Yang

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math.SP2025

Weak separability and partial Fermi isospectrality of discrete periodic SchrÃ¶dinger operators

Jifeng Chu, Kang Lyu, Chuan-Fu Yang

In this paper, we consider the discrete periodic SchrÃ¶dinger operators $I^ + V$ on $Z^{d}$ , where $V$ is $I^$ -periodic with $Î=q_1 \mathbb{Z}\oplus q_2\mathbb{Z}\oplus\cdots\oplus q…

math.SP2025

On the inverse transmission eigenvalue problem with a piecewise $W_{2}^{1}$ refractive index

Tao Liu, Kang Lyu, Guangsheng Wei +1

In this paper, we consider the inverse spectral problem of determining the spherically symmetric refractive index in a bounded spherical region of radius $b$ . Instead of the usual…

Weak separability and partial Fermi isospectrality of discrete periodic SchrÃ¶dinger operators

On the inverse transmission eigenvalue problem with a piecewise W21​ refractive index

On the inverse transmission eigenvalue problem with a piecewise $W_{2}^{1}$ refractive index