The Noether inequality for minimal threefolds of general type with small geometric genus

Let XX be a minimal projective 33-fold of general type, and let pg(X)p_g(X) denote its geometric genus. Assume

5pg(X)10.5\leq p_g(X)\leq 10.

Noether inequality. Then

KX343pg(X)103.K_X^3\geq \frac{4}{3}p_g(X)-\frac{10}{3}.

This is the remaining open case of the Noether inequality in dimension 33: the inequality is known except for finitely many families, while the range 5pg105\leq p_g\leq 10 is identified in the source as open.

Sources & referencesView supporting material

Primary source

Meng Chen, Chen Jiang and Binru Li, “On minimal varieties growing from quasismooth weighted hypersurfaces”, arXiv:2005.09828 (2022).

Additional references

2 papers in this index state this conjecture (2005–2020). The statement above is taken from the most recent of them; the others are arXiv:math/0507606.

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