Un r�sultat sur la monodromie

The characteristic polynomial of the monodromy

“…Let h" be the monodromy of the polynomial / +/'. By [16], h" is equivalent to 2 , which proves the italicized assertion.…”

The complex hyperbolic geometry of the moduli space of cubic surfaces

“…The action of Ψ on the first summand is well known, and can be derived from the Sebastiani-Thom theorem [46]. Note first that the space V (k) of vanishing cycles for the degeneration of zero-dimensional varieties z k = t is the Z-module spanned by the differences of roots a i − a i+1 .…”

Lagrangian tori in four-dimensional Milnor fibres

“…y m ). We will want to use theorems that describe vanishing cycles for the join singularity, P (x) + Q(y), following Thom and Sebastiani [43]. Let µ be the Milnor number of P , and ν that of Q.…”