Canonical singularities conjecture for Kontsevich moduli spaces

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Let X⊂PnX\subset \mathbb{P}^n be a general hypersurface of degree dd, and let M‾0,0(X,e)\overline{\mathcal{M}}_{0,0}(X,e) be the Kontsevich moduli space of degree-ee stable maps to XX. Canonical singularities conjecture. If e≥3e\geq 3 and d+e≤nd+e\leq n, then M‾0,0(X,e)\overline{\mathcal{M}}_{0,0}(X,e) is a normal, Q\mathbb{Q}-Gorenstein variety with only canonical singularities. If e=2e=2, d+3≤nd+3\leq n, then M‾0,0(X,2)\overline{\mathcal{M}}_{0,0}(X,2) has the same properties. This is the corresponding assertion for a general hypersurface, strengthening the established stack-theoretic results discussed earlier; the supplied text gives no resolution status.

References

Primary source

Jason Starr, “The Kodaira dimension of spaces of rational curves on low degree hypersurfaces”, arXiv:math/0305432 (2003).

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