TY - JOUR AU - Paul Howard AU - Eleftherios Tachtsis TI - On rigid relation principles in set theory without the axiom of choice JO - Fundamenta Mathematicae PY - 2016 SP - 199 EP - 226 VL - 232 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm960-12-2015/ DO - 10.4064/fm960-12-2015 LA - en ID - 10_4064_fm960_12_2015 ER -