Let C be a plane rational curve of degree d and p : ˜C →C be its normalization.We are interested in the splitting type (a, b) of C, where O_P1 (−a − d) ⊕ O_P1 (−b − d) gives the syzigies of the ideal ( f_0, f_1, f_2) ⊂ K[s, t], and ( f_0, f_1, f_2) is a parameterization of C. We want to describe in which cases (a, b) = (k, d − k) (2k ≤ d), via a geometric description; namely we show that (a, b) = (k, d − k) if and only if C is the projection of a rational curve on a rational normal surface in Pk+1.

On parameterizations of plane rational curves and their syzygies / Alessandra Bernardi; Alessandro Gimigliano; Monica Idà. - In: MATHEMATISCHE NACHRICHTEN. - ISSN 0025-584X. - ELETTRONICO. - 289:5/6(2016), pp. 537-545. [10.1002/mana.201500264]

On parameterizations of plane rational curves and their syzygies

BERNARDI, ALESSANDRA;GIMIGLIANO, ALESSANDRO;IDA', MONICA
2016

Abstract

Let C be a plane rational curve of degree d and p : ˜C →C be its normalization.We are interested in the splitting type (a, b) of C, where O_P1 (−a − d) ⊕ O_P1 (−b − d) gives the syzigies of the ideal ( f_0, f_1, f_2) ⊂ K[s, t], and ( f_0, f_1, f_2) is a parameterization of C. We want to describe in which cases (a, b) = (k, d − k) (2k ≤ d), via a geometric description; namely we show that (a, b) = (k, d − k) if and only if C is the projection of a rational curve on a rational normal surface in Pk+1.
2016
On parameterizations of plane rational curves and their syzygies / Alessandra Bernardi; Alessandro Gimigliano; Monica Idà. - In: MATHEMATISCHE NACHRICHTEN. - ISSN 0025-584X. - ELETTRONICO. - 289:5/6(2016), pp. 537-545. [10.1002/mana.201500264]
Alessandra Bernardi; Alessandro Gimigliano; Monica Idà
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/548392
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