2000/06/26 by Jan Stevens, Stevens, Jan
Computer Science · Engineering · Mathematics · #14B05 (primary) 14H50 #32S25 (secondary) #Advanced Numerical Analysis Techniques #Algebraic Geometry (math.AG) #Algebraic Geometry and Number Theory #FOS: Mathematics #Polynomial and algebraic computation #math.AG #msc:14B05 #msc:14H50 #msc:32S25
paper · pdf · doi:10.48550/arxiv.math/0006189
38 pp., plain TeX
arxiv created 2000/06/26 · openalex publication_date 2000/06/26 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 methods to compute infinitesimal deformations. Deformations can be obstructed. For the case of quadratic equations on the scroll we derive explicit base equations. They are used to study extensions of tetragonal curves.