Weak types of L (θc)‎ spaces

الملخص EN

The purpose of the present paper is to extend the notion of L (θc)-Spaces, these are the spaces whose Lindelof subsets are θ-closed.

We introduced four weak forms of this concept namely θLi, where I = 1, 2, 3, 4 and investigate their relationships with L (θc)-spaces as well as among themselves.

Finally, we gave several examples illustrate our results.