Notes on Non-Generic Isomonodromy Deformations

[摘要] Some of the main results of [Cotti G., Dubrovin B., Guzzetti D., Duke Math. J. , to appear, arXiv:1706.04808], concerning non-generic isomonodromy deformations of a certain linear differential system with irregular singularity and coalescing eigenvalues, are reviewed from the point of view of Pfaffian systems, making a distinction between weak and strong isomonodromic deformations. Such distinction has a counterpart in the case of Fuchsian systems, which is well known as Schlesinger and non-Schlesinger deformations, reviewed in Appendix A.

[关键词] isomonodromy deformations;Stokes phenomenon;Pfaffian system;coalescing eigenvalues;Schlesinger deformations