On the derived category of 1-motives, I
On the derived category of 1-motives, I
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在 1-动机的派生范畴上,我
DOI:
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发表时间:
2007
期刊:
影响因子:
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通讯作者:
B. Kahn
中科院分区:
文献类型:
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作者:
L. Barbieri;B. Kahn
We consider the category of Deligne 1-motives over a perfect field k of exponential characteristic p and its derived category for a suitable exact structure after inverting p. As a first result, we provide a fully faithful embedding into an etale version of Voevodsky's triangulated category of geometric motives. Our second main result is that this full embedding"almost"has a left adjoint, that we call \LAlb. Applied to the motive of a variety we thus get a bounded complex of 1-motives, that we compute fully for smooth varieties and partly for singular varieties. As an application we give motivic proofs of Roitman type theorems (in characteristic 0).