Mumford's conjecture with equivalent uniruledness and curvature conditions

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Let XX be a projective manifold. Mumford's equivalent-conditions conjecture. If

H0(X,(TX∗)⊗m)=0H^0(X,(T_X^*)^{\otimes m})=0

for every m≥1m\geq 1, then each of the following holds: XX is uniruled; KXK_X is not pseudo-effective; KX−1K_X^{-1} is RC-positive; XX admits a Hermitian metric with positive Chern scalar curvature; and, for every ample line bundle AA, there is a positive integer cAc_A such that

H0(X,KX⊗ℓ⊗A⊗k)=0H^0(X,K_X^{\otimes \ell}\otimes A^{\otimes k})=0

for ℓ≥cA(k+1)\ell\geq c_A(k+1) and k≥0k\geq 0. The source explains that the uniruledness conjecture would imply this formulation, so it remains open insofar as that conjecture remains open.

References

Primary source

Xiaokui Yang, “RC-positivity, rational connectedness and Yau's conjecture”, arXiv:1708.06713 (2018).

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