ωι-Sonslin trees under countable support iterations
Tom 142 / 1993
Fundamenta Mathematicae 142 (1993), 257-261
DOI: 10.4064/fm-142-3-257-261
Streszczenie
We show the property "is proper and preserves every $ω_1$-Souslin tree" is preserved by countable support iteration.
