Volume 30:

Special volume in honor of the life and mathematics of Wolfgang Ebeling

Contents

Preface i
Editors: Anne Frühbis-Krüger, Sabir Gusein-Zade, Claus Hertling, and Michael Lönne

Life, work, and papers of Wolfgang Ebeling (1951-2025) 1
Anne Frühbis-Krüger, Sabir Gusein-Zade, Claus Hertling, Klaus Hulek, and Michael Lönne

Characterization of distinguished matrices of isolated hypersurface singularities through their spectral numbers 13
Sven Balnojan and Claus Hertling

Orbifold Saito theory of A and D type singularities 61
Alexey Basalaev and Anton Rarovskii

Darboux Integrability via Singularities of Invariant Curves at Infinity 81
Hans-Christian von Bothmer

A new coding theory, for normal surfaces, and ADE singularities, I 116
Fabrizio Catanese

On divisorial (i) classes 144
Olivia Dumitrescu and Nathan Priddis

Hypersurface Singularities in any Characteristic 178
Gert-Martin Greuel

On the universal and generalized orbifold Euler characteristics 207
S.M. Gusein-Zade, I. Luengo, A. Melle-Hernández, and A. Viruel

A local Zariski-van Kampen theorem 216
Helmut A. Hamm

The fundamental group of trigonal loci of strata of abelian differentials 242
Michael Lönne

Frobenius manifold for the nodal quiver 255
Atsuki Nakago, Yuuki Shiraishi, and Atsushi Takahashi

A remarkable eelliptic curve 300
Duco van Straten