The spectrum of a singularity of a germ of a plane curve (Q1175290)

Let \(X\) be a hypersurface isolated singularity (over \(\mathbb{C}\)) and consider the characteristic polynomial of the monodromy of the Milnor fibration: \(\Delta(t)=\prod^n_{j=1}(t-e^{2\pi i\alpha_j})\), where \(\alpha_j\in\mathbb{Q}\). By definition the set \(\{\alpha_1,\ldots,\alpha_n\}\) is the spectrum of \(X\). The authors give an algorithm to compute this spectrum for any reduced plane curve.