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The goal of this thesis is the development and implementation of a non-perturbative solution method for Wegner's flow equations. We show that a parameterization of the flowing Hamiltonian in terms of a scalar function allows the flow…

Other Condensed Matter · Physics 2009-11-11 J. N. Kriel

In this paper we show some explicit results regarding non-linear diffusive equations on Poincar\'e half plane. We obtain exact solutions by using the generalized separation of variables and we also show the meaning of these results in the…

Analysis of PDEs · Mathematics 2023-09-26 Roberto Garra , Francesco Maltese

In this note, we describe a new link between Perelman's monotonicity formula for the reduced volume and ideas from optimal transport theory.

Differential Geometry · Mathematics 2010-07-08 S. Brendle

In this note, we provide a very simple proof of the uniformization theorem of Riemann surfaces by Ricci flow. The argument builds on a refinement of Hamilton's isoperimetric estimate for the Ricci flow on the two-sphere.

Differential Geometry · Mathematics 2024-08-27 Yucheng Ji

In this note we derive an improved no-local-collapsing theorem of Ricci flow under the scalar curvature bound condition along the worldline of the basepoint. It is a refinement of Perelman's no-local-collapsing theorem.

Differential Geometry · Mathematics 2021-07-28 Wangjian Jian

In this paper, we provide a proof of Hamilton's extrinsic pinching theorem using the mean curvature flow approach.

Differential Geometry · Mathematics 2026-04-29 Liang Cheng , Zhenyu Lu

In [ZY2], the second author proved Perelman's assertion, namely, for an ancient Ricci flow with bounded and nonnegative curvature operator, bounded entropy is equivalent to noncollapsing on all scales. In this paper, we continue this…

Differential Geometry · Mathematics 2021-07-09 Zilu Ma , Yongjia Zhang

We present a higher-dimensional version of the Poincar\'e-Birkhoff theorem which applies to Poincar\'e time maps of Hamiltonian systems. The maps under consideration are neither required to be close to the identity nor to have a monotone…

Symplectic Geometry · Mathematics 2018-05-09 Alessandro Fonda , Antonio J. Ureña

A fundamental tool in the analysis of Ricci flow is a compactness result of Hamilton in the spirit of the work of Cheeger, Gromov and others. Roughly speaking it allows one to take a sequence of Ricci flows with uniformly bounded curvature…

Differential Geometry · Mathematics 2011-10-18 Peter Topping

This is the announcement of an alternative approach to the 3-dimensional Poincar\'e Conjecture, different from Perelman's big and spectacular breakthrough. No claim concerning the other parts of the Thurston Geometrization Conjecture, come…

Geometric Topology · Mathematics 2007-05-23 Valentin Poenaru

The Ricci iteration is a discrete analogue of the Ricci flow. According to Perelman, the Ricci flow converges to a Kahler-Einstein metric whenever one exists, and it has been conjectured that the Ricci iteration should behave similarly.…

Differential Geometry · Mathematics 2021-12-03 Tamás Darvas , Yanir A. Rubinstein

We indicate some formulas connecting Ricci flow and the Perelman entropy functional to Fisher information, differential entropy, and the quantum potential.

Mathematical Physics · Physics 2007-05-23 Robert Carroll

Based on the compactness of the moduli of non-collapsed Calabi-Yau spaces with mild singularities, we set up a structure theory for polarized K\"ahler Ricci flows with proper geometric bounds. Our theory is a generalization of the structure…

Differential Geometry · Mathematics 2016-05-06 Xiuxiong Chen , Bing Wang

In this paper we construct a version of Ricci flow for noncommutative 2-tori, based on a spectral formulation in terms of the eigenvalues and eigenfunction of the Laplacian and recent results on the Gauss-Bonnet theorem for noncommutative…

High Energy Physics - Theory · Physics 2015-05-28 Tanvir Ahamed Bhuyain , Matilde Marcolli

The paper contains a proof of the Fontaine-Jannsen conjecture based on a crystalline version of the p-adic Poincar'e lemma (different proofs were found earlier by Faltings, Niziol and Tsuji).

Algebraic Geometry · Mathematics 2013-02-22 Alexander Beilinson

This is the first of a series of papers on the long-time behavior of 3 dimensional Ricci flows with surgery. In this paper we first fix a notion of Ricci flows with surgery, which will be used in this and the following three papers. Then we…

Differential Geometry · Mathematics 2018-03-16 Richard H. Bamler

In this survey we review Hamilton's entropy and Perelman's entropy, and provide motivations for these concepts. Then we review recent results on the logarithmic Sobolev inequality, the Sobolev inequalities and kappa-noncollapsing estimates…

Differential Geometry · Mathematics 2007-09-19 Rugang Ye

We outline a simple proof of PC without surgeries using the homogeneous flow introduced in [O].

General Mathematics · Mathematics 2021-03-12 Ercüment Ortaçgil

Some modification of the old version.In this note we give a proof of a result which is related to Perelman's theorem in Section 10.3 of the paper "The entropy formula for the Ricci flow and its geometric applications".

Differential Geometry · Mathematics 2014-11-11 Peng Lu

In 1870s, L. Boltzmann proved the famous $H$-theorem for the Boltzmann equation in the kinetic theory of gas and gave the statistical interpretation of the thermodynamic entropy. In 2002, G. Perelman introduced the notion of $W$-entropy and…

Differential Geometry · Mathematics 2013-03-22 Xiang-Dong Li