Generalized projections of Borel and analytic sets
Tom 71 / 1996
Colloquium Mathematicum 71 (1996), 47-53
DOI: 10.4064/cm-71-1-47-53
Streszczenie
For a σ-ideal I of sets in a Polish space X and for A ⊆ $X^2$, we consider the generalized projection
