Numerical triviality and pullbacks
classification
🧮 math.AG
keywords
divisorcomplexconnectedequivalentf-numericallyfibersmorphismnumerical
read the original abstract
Let f: X \to Z be a surjective morphism of smooth complex projective varieties with connected fibers. Suppose that L is a pseudo-effective divisor on X that is f-numerically trivial. We show that there is a divisor D on Z such that L is numerically equivalent to f^*D.
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