The stable ALE desingularization conjecture for spherical and hyperbolic orbifolds

Let (N4,gb)(N^4,g_b) be a stable Ricci-flat ALE 44-manifold with tangent cone at infinity R4/Γ\mathbb{R}^4/\Gamma. Let (Mo,go)(M_o,g_o) be a spherical, respectively hyperbolic, orbifold with a singularity modeled on R4/Γ\mathbb{R}^4/\Gamma. Denote the connected sum along the link S3/Γ\mathbb{S}^3/\Gamma by Mo#S3/ΓNM_o\#_{\mathbb{S}^3/\Gamma}N.

Stable ALE desingularization conjecture. There exists an ancient, respectively immortal, renormalized Ricci flow on Mo#S3/ΓNM_o\#_{\mathbb{S}^3/\Gamma}N with limit (Mo,go)(M_o,g_o) at -\infty, respectively ++\infty.

This extends the paper's constructions from the particular ALE spaces treated there to any stable Ricci-flat ALE 44-manifold and relates the time direction to the stability type of the orbifold soliton.

Sources & referencesView supporting material

Primary source

Alix Deruelle and Tristan Ozuch, “Orbifold singularity formation along ancient and immortal Ricci flows”, arXiv:2410.16075 (2025).

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