TY - JOUR AU - Luengo Velasco, Ignacio PY - 1987 DO - 10.1007/BF01389034 SN - 0020-9910 UR - https://hdl.handle.net/20.500.14352/64684 T2 - Inventiones Mathematicae LA - eng M2 - 139 PB - Springer-Verlag KW - Mu-constant deformation KW - Equimultiple deformation KW - Mu-constant stratum KW - Superisolated singularity TI - The μ-constant stratum is not smooth TY - journal article VL - 90 ER -