3 papers
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…
math.RT2016
Reduced and nonreduced presentations of Weyl group elements
Sven Balnojan, Claus Hertling
This paper is a sequel to work of Dynkin on subroot lattices of root lattices and to work of Carter on presentations of Weyl group elements as products of reflections. The quotient…