A pathology of asymptotic multiplicity in the relative setting
journal contributionposted on 20.06.2017 by J. Lesieutre
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We point out an example of a projective family π : X → S, a π-pseudoeffective divisor D on X, and a subvariety V ⊂ X for which the asymptotic multiplicity σV (D; X/S) is infinite. This shows that the divisorial Zariski decomposition is not always defined for pseudoeffective divisors in the relative setting.