On a certain hypergeometric motive of weight 2 and rank 3
Abstract
We study a family of hypergeometric motives H(α,β|t) attached to a pair of tuples α=(1/4,1/2,3/4), β=(0,0,0). To each such motive we can attach a system of --adic realisations with the trace of geometric Frobenius given by the evaluation of the finite field analogue of complex hypergeometric function. Geometry of elliptic fibrations makes it possible to to realise the motive H(α,β|t) as a pure Chow motive attached to a suitable K3 surface Vt.
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