In this paper, we give an example of a HausdorfF star-Lindelof space X having property (a) such that e(X) = 2C. This is a partial answer to a question of Matveev.
文摘In this paper, we give an example of a HausdorfF star-Lindelof space X having property (a) such that e(X) = 2C. This is a partial answer to a question of Matveev.