Year of Graduation
Formal Normal Forms and Realization Theorems for Difference Systems
The text of the paper raises questions about finding a formal solution for a maximally generalized system of equations (where each equation bounds two points z and \varphi(z), where \varphi (z) is an automorphism). It turns out that some techniques for constructing a formal solution of an ODE system can be easily transferred for this case. Also, an approximate plan for proving a positive response to the monodromy problem for the case of a system of difference equations will be described in the second part of the work, namely, it will be shown that the system can be reconstructed from a known monodromy matrix.