arXiv · math/0504453
Let k be a field of characteristic 0 and M(k) is the category of 1-motives over k. We prove that Biext^1(M_1,M_2;M_3)=Hom_{MR(k)}(T(M_1)\otimes T(M_2), T(M_3))
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Cristiana Bertolin. 2010-07-22. Realizations of Biextensions. https://arxiv.org/abs/math/0504453
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