Erdenberger–Hulek intersection-number vanishing conjecture for principally polarized abelian varieties

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Let Ag‾P{\overline{{\mathcal A}_g}^P} be the perfect-cone compactification of the moduli space of principally polarized abelian varieties, let LL be the Hodge class, let DD be its boundary divisor, and let gg and ii be integers with 0≤i≤g(g+1)/20\leq i\leq g(g+1)/2. Write ⟨LiDg(g+1)2−i⟩Ag‾P\langle L^iD^{\frac{g(g+1)}2-i}\rangle_{{\overline{{\mathcal A}_g}^P}} for the corresponding intersection number.

Intersection-number vanishing conjecture. The intersection number

⟨LiDg(g+1)2−i⟩Ag‾P\left\langle L^iD^{\frac{g(g+1)}2-i}\right\rangle_{{\overline{{\mathcal A}_g}^P}}

is zero unless i=k(k+1)2=dim⁡Aki=\frac{k(k+1)}2=\dim {\mathcal A}_k for some k≤gk\leq g.

The conjecture is motivated by the vanishing pattern of the computed intersection numbers in low genera. The source gives no resolution status.

References

Primary source

Samuel Grushevsky, “Geometry of A_g and Its Compactifications”, arXiv:0711.0094 (2010).

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