%0 Journal Article %A Rangachev, Antoni %T The evolving notion of multiplicity as an invariant in singularity theory %J Mathematics and Education in Mathematics %D 2022 %P 89-99 %V 51 %I mathdoc %U http://geodesic.mathdoc.fr/item/MEM_2022_51_a6/ %G en %F MEM_2022_51_a6