${\Pi }_2^1$ singletons and $O$

Harrington, Leo, and Kechris, Alexander. "$Π^1_2$ singletons and $O^#$." Fundamenta Mathematicae 95.3 (1977): 167-171. <http://eudml.org/doc/215019>.

@article{Harrington1977,
author = {Harrington, Leo, Kechris, Alexander},
journal = {Fundamenta Mathematicae},
language = {eng},
number = {3},
pages = {167-171},
title = {$Π^1_2$ singletons and $O^#$},
url = {http://eudml.org/doc/215019},
volume = {95},
year = {1977},
}

TY - JOUR
AU - Harrington, Leo
AU - Kechris, Alexander
TI - $Π^1_2$ singletons and $O^#$
JO - Fundamenta Mathematicae
PY - 1977
VL - 95
IS - 3
SP - 167
EP - 171
LA - eng
UR - http://eudml.org/doc/215019
ER -