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- W2600028680 abstract "We generalize the recent work of Fomin and Mikhalkin on polynomial formulas for Severi degrees. The degree of the Severi variety of plane curves of degree d and δ nodes is given by a polynomial in d, provided δ is fixed and d is large enough. We extend this result to generalized Severi varieties parametrizing plane curves which, in addition, satisfy tangency conditions of given orders with respect to a given line. We show that the degrees of these varieties, appropriately rescaled, are given by a combinatorially defined ``relative node polynomial'' in the tangency orders, provided the latter are large enough. We describe a method to compute these polynomials for arbitrary δ , and use it to present explicit formulas for δ ≤ 6. We also give a threshold for polynomiality, and compute the first few leading terms for any δ . Nous généralisons les travaux récents de Fomin et Mikhalkin sur des formules polynomiales pour les degrés de Severi. Le degré de la variété de Severi des courbes planes de degré d et à δ nœuds est donné par un polynôme en d , pour δ fixé et d assez grand. Nous étendons ce résultat aux variétés de Severi généralisées paramétrant les courbes planes et qui, en outre, satisfont à des conditions de tangence d'ordres donnés avec une droite fixée. Nous montrons que les degrés de ces variétés, rééchelonnés de manière appropriée, sont donnés par un ``polynôme de noeud relatif'', défini combinatoirement, en les ordres de tangence, dès que ceux-ci sont assez grands. Nous décrivons une méthode pour calculer ces polynômes pour delta arbitraire, et l'utilisons pour présenter des formules explicites pour δ ≤ 6 . Nous donnons aussi un seuil pour la polynomialité, et calculons les premiers termes dominants pour tout δ ." @default.
- W2600028680 created "2017-04-07" @default.
- W2600028680 creator A5034975605 @default.
- W2600028680 date "2011-01-01" @default.
- W2600028680 modified "2023-10-18" @default.
- W2600028680 title "Relative Node Polynomials for Plane Curves" @default.
- W2600028680 doi "https://doi.org/10.46298/dmtcs.2903" @default.
- W2600028680 hasPublicationYear "2011" @default.
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