Poincaré-Hopf型定理
A theorem of Poincaré-Hopf type
摘要:
我们计算(代数)的欧拉示性数的复杂的层与可构造的上同调。一个分层的庞加莱-霍普夫公式则是光滑庞加莱-霍普夫定理和具有紧支撑的欧拉-庞加莱特征的可加性的一个推论,只要我们有一个合适的指数定义。
英文摘要:
We compute (algebraically) the Euler characteristic of a complex of sheaves with constructible cohomology. A stratified Poincaré-Hopf formula is then a consequence of the smooth Poincaré-Hopf theorem and of additivity of the Euler-Poincaré characteristic with compact supports, once we have a suitable definition of index.
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