Sub-quadratic time for Riemann-Roch spaces. The case of smooth divisors over nodal plane projective curves
Résumé
We revisit the seminal Brill-Noether algorithm in the rather generic situation of smooth divisors over a nodal plane projective curve. Our approach takes advantage of fast algorithms for polynomials and structured matrices. We reach sub-quadratic time for computing a basis of a Riemann-Roch space. This improves upon previously known complexity bounds.
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