A. L. Soukup:

On certain L-spaces under CH

It is shown that On the other hand it is also shown that if GCH holds and X subset 2^{omega_1} is an HFC then there is a c.c.c. poset P such that X is a c.c.c.-indestructible HFC_w in V^P. Dropping GCH we can find a proper P instead of a c.c.c. one.

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    appeared in Topology and its Applications 47 (1992) 1--7.