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Arithmeticity of the monodromy of some Kodaira fibrations

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arxiv 1805.06789 v1 pith:BWQCQRTI submitted 2018-05-17 math.GT math.AGmath.GR

Arithmeticity of the monodromy of some Kodaira fibrations

classification math.GT math.AGmath.GR
keywords algebraicmonodromyclassgroupaffirmativeanalysisarithmeticarithmeticity
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A question of Griffiths-Schmid asks when the monodromy group of an algebraic family of complex varieties is arithmetic. We resolve this in the affirmative for the class of algebraic surfaces known as Atiyah-Kodaira manifolds, which have base and fibers equal to complete algebraic curves. Our methods are topological in nature and involve an analysis of the "geometric" monodromy, valued in the mapping class group of the fiber.

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