Center of Mathematical Sciences, Zhejiang University, Hangzhou
310027, China
;Institute of Mathematics, Academy of Mathematics and
Systems Science, the Chinese Academy of Sciences, Beijing 100080, China
Abstract:
We use a new method to construct a class of
asymptotically locally flat, scalar flat metrics. These metrics
were constructed via algebraic geometry method by LeBrun before
and provide counterexamples to the generalized positive action
conjecture of Hawking and Pope.