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arXiv · 1603.03194

Periods of Drinfeld modules and local shtukas with complex multiplication

Urs Hartl·Rajneesh Kumar Singh
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Abstract

Colmez conjectured a product formula for periods of abelian varieties over number fields with complex multiplication and proved it in some cases. His conjecture is equivalent to a formula for the Faltings height of CM abelian varieties in terms of the logarithmic derivatives at $s=0$ of certain Artin $L$-functions. In a series of articles we investigate the analog of Colmez's theory in the arithmetic of function fields. There abelian varieties are replaced by Drinfeld modules and their higher dimensional generalizations, so-called $A$-motives. In the present article we prove the product formula for the Carlitz module and we compute the valuations of the periods of a CM $A$-motive at all finite places in terms of Artin $L$-series. The latter is achieved by investigating the local shtukas associated with the $A$-motive.

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Urs Hartl, Rajneesh Kumar Singh. 2016-03-10. Periods of Drinfeld modules and local shtukas with complex multiplication. https://doi.org/10.1017/s1474748017000494

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