The Shafarevich finiteness conjecture for motives

About 11 years old · traced to

Fix nonnegative integers hr,w−rh^{r,w-r} as above and a set SS of prime numbers. Let FF be the underlying number field, let ww be the weight, and let MM be a pure Z\mathbb Z-motive over FF with de Rham realization MdR⁡M_{\operatorname{dR}}. Shafarevich's conjecture. There are finitely many isomorphism classes of pure Z\mathbb Z-motives of weight ww such that

dim⁡gr⁡r(MdR⁡)=hr,w−r,\dim\operatorname{gr}^r(M_{\operatorname{dR}})=h^{r,w-r},

and which have pure good reduction outside SS and semistable reduction inside SS. The source presents this as a finiteness analogue of the Shafarevich conjecture and says that the version without the purity condition should also hold; no resolution is supplied.

References

Primary source

Teruhisa Koshikawa, “On heights of motives with semistable reduction”, arXiv:1505.01873 (2015).

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