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Paper detail

Jumping numbers and ordered tree structures on the dual graph

Let R be a two-dimensional regular local ring having an algebraically closed residue field and let a be a complete ideal of finite colength in R. In this article we investigate the jumping numbers of a by means of the dual graph of the minimal log resolution of the pair (X,a). Our main result is a combinatorial criterium for a positive rational number to be a jumping number. In particular, we associate to each jumping number certain ordered tree structures on the dual graph.

preprint2011arXivOpen access
Eero HyryTarmo Järvilehto
math.ACmath.AG
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Eero HyryTarmo Järvilehto

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