4 problems

Fix $\delta\ge1$, and write the refined plane Severi degree as … Let $N_\delta(d;y)$ be the refined node polynomial, with coefficients $p^\delta_i(d)$ defined analogously. Coeffici…

Let $\Delta$ be a convex lattice polygon, let $S=X(\Delta)$ be the associated smooth toric surface, and let $L=L(\Delta)$ be a $\delta$-very ample line bundle. Let…

For a projective surface $S$ and line bundle $L$, let $N^{(S,L),\delta}(y)$ denote the refined Severi degree and let $\widetilde N^{(S,L),\delta}(y)$ denote the refined universal i…

Let $C_\tau(\delta)$ denote the coefficient vector associated with a type $\tau$ in the computation of the node polynomial $N_\delta(d)$. Leading-coefficient polynomiality conjectu…