Higher Nash Blow-ups
Module of Principal Parts
Determinantal Varieties
Higher Zariski-Lipman Conjecture (Hypersurface case, Graded case)
We study the higher Nash blow-ups introduced by T. Yasuda and investigate the higher version of the classical Nobile's theorem. In particular, we give a characteristic free proof of the higher Nobile's theorem for the graded case. We also give a proof for the 2nd order Nash blow-ups in characteristic zero.
We prove the higher Zariski-Lipman conjecture for hypersurfaces given by homogeneous equations over a field of characteristic zero.