Positive characteristic analogue of Kashiwara-Malgrange theorem
アブストラクト
Let X be a smooth algebraic variety over the complex numbers and f be a function on it. There are several known constructions associated to f that measure the singularity of f^{-1}(0). In the context of D-modules, one can associate the Bernstein-Sato polynomial, or b-function, of f. On the other hand, in the context of constructible sheaves, we have the nearby cycles complex. The Kashiwara-Malgrange theorem states that the roots of the b-function determine the monodromy eigenvalues of the nearby cycles. In this talk, I would like to discuss a positive characteristic analogue of this result. This is a joint work with Eamon Quinlan-Gallego and Hiroki Kato.