In this paper we consider a problem initially posed by Yi . We prove two uniqueness theorems on meromorphic functions which improve and extend results of Lahiri  and Fang and Lahiri . We provide an example that shows that a condition in one of our results is sharp.
Cite this article
Abhijit Banerjee, Uniqueness of meromorphic functions sharing two sets with finite weight. Port. Math. 65 (2008), no. 1, pp. 81–93DOI 10.4171/PM/1800