Finite-gap difference operators with elliptic coefficients and their spectral curves

The spectral properties of differential operators with matrix coefficients on elliptic systems with boundary conditions

Let $$(Lv)(t)=sum^{n} _{i,j=1} (-1)^{j} d_{j} left( s^{2alpha}(t) b_{ij}(t) mu(t) d_{i}v(t)right),$$ be a non-selfadjoint differential operator on the Hilbert space $L_{2}(Omega)$ with Dirichlet-type boundary conditions. In continuing of papers [10-12], let the conditions made on the operator $ L$ be sufficiently more general than [11] and [12] as defined in Section $1$. In this paper, we estim...

Asymptotic distribution of eigenvalues of the elliptic operator system

Since the theory of spectral properties of non-self-accession differential operators on Sobolev spaces is an important field in mathematics, therefore, different techniques are used to study them. In this paper, two types of non-self-accession differential operators on Sobolev spaces are considered and their spectral properties are investigated with two different and new techniques.

On Algebraically Integrable Differential Operators on an Elliptic Curve

We study differential operators on an elliptic curve of order higher than 2 which are algebraically integrable (i.e., finite gap). We discuss classification of such operators of order 3 with one pole, discovering exotic operators on special elliptic curves defined over Q which do not deform to generic elliptic curves. We also study algebraically integrable operators of higher order with several...

On the Spectral Properties of Degenerate Non-selfadjoint Elliptic systems of Differential Operators

On two-dimensional finite-gap potential Schrödinger and Dirac operators with singular spectral curves

In the present paper we describe a wide class of two-dimensional potential Schrödinger and Dirac operators which are finite-gap on the zero energy level and whose spectral curves at this level are singular and, in particular, may have n-multiple points with n ≥ 3. Dirac operators with such spectral curves are important for the Weierstrass representation of tori in R [1, 2]. A study of finite-ga...