Subadjunction of log canonical divisors for a subvariety of codimension 2
Yujiro Kawamata
alg-geomarXiv:alg-geom/9511015
Abstract
We obtain a formula which relates the log canonical divisor of the ambient space with that of a subvariety of codimension 2 by using Knudsen's moduli space of pointed stable curves of genus 0.
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