TY - JOUR AU - Vopěnka, Petr TI - Concerning a proof of $\aleph_{\alpha+1}\leqq 2^{\aleph_\alpha}$ without axiom of choice: A correction JO - Commentationes Mathematicae Universitatis Carolinae PY - 1965 SP - 337 VL - 6 IS - 3 UR - http://geodesic.mathdoc.fr/item/CMUC_1965_6_3_a2/ LA - en ID - CMUC_1965_6_3_a2 ER -