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Dive into the research topics where Klaus Kröncke is active.

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Featured researches published by Klaus Kröncke.


Calculus of Variations and Partial Differential Equations | 2015

Stability and instability of Ricci solitons

Klaus Kröncke

We consider the volume-normalized Ricci flow close to compact shrinking Ricci solitons. We show that if a compact Ricci soliton


Annals of Global Analysis and Geometry | 2015

On the stability of Einstein manifolds

Klaus Kröncke


Differential Geometry and Its Applications | 2015

On infinitesimal Einstein deformations

Klaus Kröncke

(M,g)


Transactions of the American Mathematical Society | 2017

Stable and unstable Einstein warped products

Klaus Kröncke


Classical and Quantum Gravity | 2016

The Einstein−Λ flow on product manifolds

David Fajman; Klaus Kröncke

(M,g) is a local maximum of Perelman’s shrinker entropy, any normalized Ricci flow starting close to it exists for all time and converges towards a Ricci soliton. If


Calculus of Variations and Partial Differential Equations | 2018

Global existence of Dirac-wave maps with curvature term on expanding spacetimes

Volker Branding; Klaus Kröncke


Classical and Quantum Gravity | 2018

On the CMC-Einstein-Λ flow

David Fajman; Klaus Kröncke

g


Journal of Geometric Analysis | 2017

The Ricci Flow with Metric Torsion on Closed Surfaces

Volker Branding; Klaus Kröncke


Archive | 2016

Variational Stability and Rigidity of Compact Einstein Manifolds

Klaus Kröncke

g is not a local maximum of the shrinker entropy, we show that there exists a nontrivial normalized Ricci flow emerging from it. These theorems are analogues of results in the Ricci-flat and in the Einstein case (Haslhofer and Müller, arXiv:1301.3219, 2013; Kröncke, arXiv:1312.2224, 2013).


Journal of Geometric Analysis | 2016

Rigidity and Infinitesimal Deformability of Ricci Solitons

Klaus Kröncke

Certain curvature conditions for the stability of Einstein manifolds with respect to the Einstein–Hilbert action are given. These conditions are given in terms of quantities involving the Weyl tensor and the Bochner tensor. In dimension six, a stability criterion involving the Euler characteristic is given.

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