标题： 二维有限间隙势薛定谔和狄拉克算子的奇异谱曲线 显示英文标题

标题： On two-dimensional finite-gap potential Schrodinger and Dirac operators with singular spectral curves

摘要： 我们描述了二维势薛定谔和狄拉克算子，在一个能量水平上是有限间隙的，并且具有奇异谱曲线。 看起来这些奇点可能相当复杂。 这样的狄拉克算子作为嵌入三维空间中的环面的谱曲线出现。 显示英文摘要

摘要： We describe two-dimensional potential Schrodinger and Dirac operators which are finite-gap at one energy level and have singular spectral curves. It appears that the singularities can be rather complicated. Such Dirac operators appear as the spectral curves of tori immersed into the three-space.