Maximal-time conjecture for the adapted Chern–Ricci flow

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Let (M,I,J,K,g)(M,I,J,K,g) be a compact hyperhermitian manifold, let ω\omega be its associated real (1,1)(1,1)-form, and write S−:=12(S−JS)S^-:=\frac12(S-JS) for the JJ-anti-invariant part of a covariant 22-tensor SS. Consider the adapted Chern–Ricci flow

ω˙(t)=−Ric⁡−(ω(t)),ω(0)=ω.\dot\omega(t)=-\operatorname{Ric}^-(\omega(t)),\qquad \omega(0)=\omega.

Define

T=sup⁡{t≥0: there exists ψ∈C∞(M) such that ω−tRic⁡(ω)−+i(∂∂ˉψ)−>0}.T=\sup\left\{t\geq 0:\,\text{there exists }\psi\in C^{\infty}(M)\text{ such that }\omega-t\operatorname{Ric}(\omega)^-+i(\partial\bar\partial\psi)^->0\right\}.

Maximal-time conjecture. There exists a unique maximal solution to the adapted Chern–Ricci flow on [0,T)[0,T).

This is proposed by analogy with the Kähler and Hermitian cases. The source provides no resolution evidence, so the conjecture remains open in this record.

References

Primary source

Lucio Bedulli, Giovanni Gentili and Luigi Vezzoni, “The parabolic quaternionic Calabi-Yau equation on hyperkähler manifolds”, arXiv:2303.02689 (2023).

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