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math.LO2014★ 9 cited
Ranks of -limits of filter sequences
Adam Kwela, Ireneusz Recław
We give an exact value of the rank of an -Fubini sum of filters for the case where is a Borel filter of rank . We also consider -limits o…
math.LO1999
Not every gamma-set is strongly meager
Tomek Bartoszynski, Ireneusz Reclaw
We present two constructions of gamma-sets which are large in sense of category.