zFzwherezwareholomorphiccoordinatesonC2FisasmoothfunctionsatisfyingFzojzjkasz0andk2AssumethatShasanisolatedCRsingularityattheoriginLetuswriteXkCz zCk0zkC0k zkzC0k ID: 142178
z+F(z);where(z;w)areholomorphiccoordinatesonC2 FisasmoothfunctionsatisfyingF(z)=o(jzjk)asz!0