前者称为微分算子的谱分析，后者称为逆谱问题。

The former is called the spectra analysis of a differential operator and the latter is the inverse spectra problem.

youdao

前者称为微分算子的谱分析，后者称为逆谱问题。

The former is called the spectra analysis of a differential operator and the latter is the inverse spectra problem.

youdao