TY - JOUR AU - Philipp Lücke AU - Sandra Müller TI - $\mathbf {\Sigma }_1$-definability at higher cardinals: Thin sets, almost disjoint families and long well-orders JO - Forum of Mathematics, Sigma PY - 2023 VL - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1017/fms.2023.102/ DO - 10.1017/fms.2023.102 LA - en ID - 10_1017_fms_2023_102 ER -