TY - JOUR AU - Jan Krajíček TI - On the weak pigeonhole principle JO - Fundamenta Mathematicae PY - 2001 SP - 123 EP - 140 VL - 170 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm170-1-8/ DO - 10.4064/fm170-1-8 LA - en ID - 10_4064_fm170_1_8 ER -