The jump of the Milnor number in the X 9 singularity class

Szymon Brzostowski, Tadeusz Krasiński
2014 Open Mathematics  
AbstractThe jump of the Milnor number of an isolated singularity f 0 is the minimal non-zero difference between the Milnor numbers of f 0 and one of its deformations (f s). We prove that for the singularities in the X 9 singularity class their jumps are equal to 2.
doi:10.2478/s11533-013-0351-4 fatcat:iywfrxvgwvht3gilnd7dk2gska