双变Chern特征标的收缩
Retraction of the bivariant Chern character
摘要:
我们表明,双变陈特征在整个循环上同调在以前的文件中构造的超连接和热核正则化,在一些有限的可和性条件下,在周期上循环回缩。技巧是Connes-Moscovici方法的双变推广,用于可求和的K-圈。这产生具体的公式陈字符的p-可和拟同态和可逆的扩展,类似于那些尼斯托。后者的提法是完全代数的,并基于普遍的扩展,坎茨和Zekri自然出现在描述双变K理论。
英文摘要:
We show that the bivariant Chern character in entire cyclic cohomology constructed in a previous paper in terms of superconnections and heat kernel regularization, retracts on periodic cocycles under some finite summability conditions. The trick is a bivariant generalization of the Connes-Moscovici method for finitely summable K-cycles. This yields concrete formulas for the Chern character of p-summable quasihomomorphisms and invertible extensions, analogous to those of Nistor. The latter formulation is completely algebraic and based on the universal extensions of Cuntz and Zekri naturally appearing in the description of bivariant K-theory.
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