Arcs, valuations and the Nash map
Abstract
Description
This paper gives a map from the set of families of arcs on a variety to the set of valuations on the rational function field of the variety We characterize a family of arcs which corresponds to a divisorial valuation by this map. We can see that both the Nash map and a certain McKay correspondence are the restrictions of this map. This paper also gives the affirmative answer to the Nash problem for a non-normal variety in a certain category. As a corollary, we get the affirmative answer for a non-normal toric variety.
One wrong statement in Theorem 3.6 was deleted. This does not affect the rest of this paper
One wrong statement in Theorem 3.6 was deleted. This does not affect the rest of this paper