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arXiv math/9912015math.AG
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相对代数微分特征标

Relative Algebraic Differential Characters

Spencer Bloch, Hélène Esnault

摘要:

设$f: X \to S$是特征为0的光滑态射,$(E, \nabla_{X/S})$是相对正则联络.定义了$X$上的相对微分特征标的上同调,它接受$(E, \nabla_{X/S})$的类.它说,特别是部分消失的痕迹迭代Atiyah类可以规范。当应用于曲线族和$c_2$时,该构造产生$f_*c_2(E)$的连接。这是由A.贝林森我们还涉及到我们的建设的痕迹复杂的Beilinson Schechtman。

英文摘要:

Let $f: X \to S$ be a smooth morphism in characteristic 0, and let $(E, \nabla_{X/S})$ be a relative regular connection. We define a cohomology of relative differential characters on $X$ which receives classes of $(E, \nabla_{X/S})$. It says in particular that the partial vanishing of the trace of the iterated Atiyah classs can be made canonical. While applied to a family of curves and $c_2$, the construction yields a connection of $f_*c_2(E)$. This one has been constructed analytically by A. Beilinson. We also relate our construction to the trace complex of Beilinson of Schechtman.

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