TY - JOUR AU - Eleftherios Tachtsis TI - The Boolean prime ideal theorem does not imply the extension of almost disjoint families to MAD families JO - Bulletin of the Polish Academy of Sciences. Mathematics PY - 2020 SP - 105 EP - 115 VL - 68 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ba201014-22-1/ DO - 10.4064/ba201014-22-1 LA - en ID - 10_4064_ba201014_22_1 ER -