Paper · Jan 20, 2022

Ricci solitons with an orthogonally intransitive 2-dimensional Abelian Killing algebra

Diego Catalano Ferraioli

math.DGarXiv:2201.07956
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Abstract

In this paper we report on a local classification of four dimensional Ricci solitons which have a -dimensional Abelian Killing algebra , whose Killing leaves are non-null and orthogonally intransitive. The classification is obtained under the following additional assumptions: (i) the curvature vector field, of the submersion defined by , is a null vector field; (ii) has a null vector; (iii) the vector field of the Ricci soliton is tangent to the Killing leaves and a symmetry of the orthogonal distribution. Since there are only few examples of orthogonally intransitive Einstein metrics, and even less is known about orthogonally intransitive Ricci solitons, we believe that these results can help fill this gap in the literature.

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Submitted
Jan 20, 2022
Subjects
math.DG
Ricci solitonsEinstein metrics4-manifoldsSurfaces

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    Topics 4-manifolds, Ricci solitons · Shared terms “Killing”, “vector field”, “four dimensional”

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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.

Ricci solitons Metrics that change under Ricci flow only by scaling and diffeomorphisms: shrinking, steady or expanding solitons. Start with: The Ricci flow on surfaces (Hamilton, 1988) Einstein metrics Metrics whose Ricci curvature is a constant multiple of the metric. They are the fixed points of normalised Ricci flow, and the most natural metrics… Start with: On the ricci curvature of a compact kähler manifold and the complex monge‐ampére equation, I (Yau, 1978) 4-manifolds Four is the first dimension where Ricci flow's singularities are not fully understood. It is also the dimension of the smooth Poincaré conjecture… Start with: The topology of four-dimensional manifolds (Freedman, 1982) Surfaces On surfaces Ricci flow is conformal and scalar. It gives a heat-flow proof of the uniformization theorem: every closed surface converges to constant… Start with: The Ricci flow on surfaces (Hamilton, 1988)

In the guidebook

  1. 5A.5
    Uniformization and the Two-Dimensional Ricci FlowBook 5A · Complex Analysis and Conformal Geometry

    Constant-curvature metrics on surfaces, and Ricci flow as a heat equation for the conformal factor.

  2. 11A.12
    Ricci Flow on SurfacesBook 11A · The Ricci Flow: Existence and Maximum Principles

    Uniformization by Ricci flow, and Hamilton’s entropy.

  3. 11B.1
    Ricci SolitonsBook 11B · Solitons, Compactness and Singularities

    Self-similar solutions: the Gaussian, cylinders, the cigar and the Bryant soliton.