Paper · Sep 21, 2022

Cobordism, Singularities and the Ricci Flow Conjecture

David Martín Velázquez, Davide De Biasio, Dieter Lust

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Abstract

In the following work, an attempt to conciliate the Ricci flow conjecture and the Cobordism conjecture, stated as refinements of the Swampland distance conjecture and of the No global symmetries conjecture respectively, is presented. This is done by starting from a suitable manifold with trivial cobordism class, applying surgery techniques to Ricci flow singularities and trivialising the cobordism class of one of the resulting connected components via the introduction of appropriate defects. The specific example of is studied in detail. A connection between the process of blowing up a point of a manifold and that of taking the connected sum of such with is explored. Hence, the problem of studying the Ricci flow of a whose cobordism class is trivialised by the addition of copies of is tackled by applying both the techniques developed in the previous sections and the classification of singularities in terms of ADE groups.

Comments: 52 pages, 2 figures

Its neighbourhood

Connected papers

The 8 papers on this site closest to this one, judged by the topics they share, the words and phrases in their titles and abstracts, and their authors. They are not its citations, but a map of the work around it. Papers here go back to 2021, plus the canon.

Connected papers This paper in the centre and the 8 papers closest to it around it, in date order clockwise from the top. The closer a paper sits to the centre, the stronger the connection. This paper Gradient flow of Einstein-Maxwell theory and Reissner-Nordström black holes (Davide De Biasio, Julian Freigang, Dieter Lust et al., 2022)1De Biasio 2022 On-Shell Flow (Davide De Biasio, 2022)6De Biasio 2022 Classification of compact manifolds with positive isotropic curvature (Hong Huang, 2023)5Huang 2023 Open manifolds with uniformly positive isotropic curvature (Hong Huang, 2023)8Huang 2023 Navigating string theory field space with geometric flows (Saskia Demulder, Dieter Lust and Thomas Raml, 2024)2Demulder 2024 Passing through nondegenerate singularities in mean curvature flows (Ao Sun, Zhihan Wang and Jinxin Xue, 2025)7Sun 2025 Towards a Taub-Bolt to Taub-NUT via Ricci flow with surgery (John Hughes, 2025)3Hughes 2025 Mean convex flows with surgery (Gábor Székelyhidi, 2026)4Székelyhidi 2026
Closer to the centre: more closely connected. Clockwise from the top: oldest to newest. Ricci flowWider flowsalso connected to each other
  1. Gradient flow of Einstein-Maxwell theory and Reissner-Nordström black holes

    Davide De Biasio, Julian Freigang, Dieter Lust et al. PDF

    Topics Singularities · Same authors Davide De Biasio, Dieter Lust

  2. Navigating string theory field space with geometric flows

    Saskia Demulder, Dieter Lust and Thomas Raml PDF

    Topics Ricci flow · Same author Dieter Lust · Shared terms “Flow Conjecture”, “Distance Conjecture”, “Swampland Distance”

  3. Mean convex flows with surgery

    Gábor SzékelyhidiWider flows PDF

    Topics Surgery, Singularities

  4. Classification of compact manifolds with positive isotropic curvature

    Hong Huang PDF

    Topics Surgery · Shared terms “connected sum”, “following”

  5. On-Shell Flow

    Davide De Biasio PDF

    Topics Ricci flow · Same author Davide De Biasio · Shared terms “Swampland Distance”, “Distance Conjecture”

  6. Open manifolds with uniformly positive isotropic curvature

    Hong Huang PDF

    Topics Surgery, Singularities · Shared terms “connected sum”, “following”

Read around it

Background reading

The guides for the topics of this paper: what each idea is, why it matters, and the papers to read first.

In the guidebook

  1. 12B.5
    The Canonical Neighbourhood TheoremBook 12B · κ-Solutions and Surgery

    Every high-curvature point looks like a neck or a cap.

  2. 12B.7
    The Singular Time: Horns and Strong NecksBook 12B · κ-Solutions and Surgery

    The limit metric at a singular time, the set Ω where curvature stays bounded, ε-horns and their ends, and strong δ-necks deep in a horn, following Perelman II §3 and Morgan–Tian chapter 11.

  3. 12B.12
    Canonical Neighbourhoods After SurgeryBook 12B · κ-Solutions and Surgery

    The strong canonical neighbourhood assumption justified across surgeries: the blow-up argument, the three cases for a limit that meets a surgery, and the choice of δ (Perelman II §5; Morgan–Tian chapter 17).