arXiv research

Study projective flat vector bundles over Riemann surfaces using Wronskian line bundles.

Classifies different types of Darboux transformations for multidimensional operators.

Paper solves a class of differential equations with specific solutions.

Darboux Wronskian formulas allow to construct Darboux transformations, but Laplace transformations, which are Darboux transformations of order one cannot be represented this way. It has been a long standing problem on what are other exceptions. In our previous work we proved that among transformations of total order on…

New operators defined on supermanifolds, linked to Darboux transformations.

We provide a complete characterization of the class of one-dimensional time-homogeneous diffusions consistent with a given law at an exponentially distributed time using classical results in diffusion theory. To illustrate we characterize the class of diffusions with the same distribution as Brownian motion at an expon…

For operators of many different kinds it has been proved that (generalized) Darboux transformations can be built using so called Wronskian formulae. Such Darboux transformations are not invertible in the sense that the corresponding mappings of the operator kernels are not invertible. The only known invertible ones wer…

We construct Bäcklund transformations (BT) for the Gelfand-Dickey hierarchy (GD$_n$-hierarchy) on the space of $n$-th order differential operators on the line. Suppose $L=\partial_x^n-\sum_{i=1}^{n-1}u_i\partial_x^{(i-1)}$ is a solution of the $j$-th GD$_n$ flow. We prove the following results: (1) There exists a syste…

Analyzes a critical spherical catenoid in hyperbolic space, proving its index and nullity.