Problèmes de modules pour les formes différentielles singulières dans le plan complexe. (Moduli problems for singular differential forms in the complex plane)
Consider Pfaffian equations \(\omega =a(x,y)dx+b(x,y)dy\) where the functions a and b are holomorphic in the origin of \({\mathbb{C}}^ 2\). Under generic assumptions on the first significant jet of \(\omega\), the authors describe the space of moduli for Pfaffian equations of small order. Some problems of rigidity and topological invariance of projective holonomy are also studied.
scientific article; zbMATH DE number 3975911