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math.AG2025
Characterization of distinguished matrices of isolated hypersurface singularities through their spectral numbers
Sven Balnojan, Claus Hertling
Isolated hypersurface singularities come equipped with distinguished bases of their Milnor lattices and with upper triangular integral matrices, which are called here distinguished…
math.AG2017
Conjectures on spectral numbers for upper triangular matrices and for singularities
Sven Balnojan, Claus Hertling
Cecotti and Vafa proposed in 1993 a beautiful idea how to associate spectral numbers to real upper triangular matrices with 1's on the d…
math.AG2017
Real Seifert forms and polarizing forms of Steenbrink mixed Hodge structures
Sven Balnojan, Claus Hertling
An isolated hypersurface singularity comes equipped with many different pairings on different spaces, the intersection form and the Seifert form on the Milnor lattice, a polarizing…