Maximal-time conjecture for the adapted Chern–Ricci flow

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(SJS)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{t0:there exists ψC(M) such that ωtRic(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.

Sources & referencesView supporting material

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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