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Surfaces with triple points
Stephan Endraß, Ulf Persson, Jan Stevens
In this paper we compute upper bounds for the number of ordinary triple points on a hypersurface in and give a complete classification for degree six (degree four or less is…
math.AG2000
Rolling Factors Deformations and Extensions of Canonical Curves
Jan Stevens
A tetragonal canonical curve is the complete intersection of two divisors on a scroll. The equations can be written in `rolling factors' format. For such homogeneous ideals we give…