AI 中文总结
研究微分同胚的黎曼流形对的拟共形等价问题，利用二阶共形上同调给出障碍，还在接触次黎曼范畴构造类似例子。
AI 中文摘要
已证明微分同胚的黎曼流形对不是拟共形等价的，而一阶不变量（极值长度、共形抛物性等）无法区分它们。该障碍源于二阶共形上同调。在接触次黎曼范畴中构造了类似例子。
英文摘要
Pairs of diffeomorphic Riemannian manifolds are shown not to be quasiconformally equivalent, while no degree one invariant (extremal lengths, conformal parabolicity,...) can distinguish them. The obstruction arises from conformal cohomology in degree 2. Similar examples are constructed in the contact subRiemannian category
