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A {\em resolving set} for a graph $\Gamma$ is a collection of vertices $S$, chosen so that for each vertex $v$, the list of distances from $v$ to the members of $S$ uniquely specifies $v$. The {\em metric dimension} of $\Gamma$ is the…

组合数学 · 数学 2013-12-19 Robert F. Bailey

We prove that the diameter of any unweighted connected graph G is O(k log n/lambda_k), for any k>= 2. Here, lambda_k is the k smallest eigenvalue of the normalized laplacian of G. This solves a problem posed by Gil Kalai.

离散数学 · 计算机科学 2012-12-13 Shayan Oveis Gharan , Luca Trevisan

We introduce a general technique for proving estimates for certain random planar maps which belong to the $\gamma$-Liouville quantum gravity (LQG) universality class for $\gamma \in (0,2)$. The family of random planar maps we consider are…

概率论 · 数学 2020-03-12 Ewain Gwynne , Nina Holden , Xin Sun

In any dimension $D$, the Euclidean Einstein-Hilbert action, which describes gravity in the absence of matter, can be discretized over random discrete spaces obtained by gluing families of polytopes together in all possible ways. In the…

数学物理 · 物理学 2018-08-29 Luca Lionni

We show that the unit area Liouville quantum gravity sphere can be constructed in two equivalent ways. The first, which was introduced by the authors and Duplantier, uses a Bessel excursion measure to produce a Gaussian free field variant…

概率论 · 数学 2018-10-11 Jason Miller , Scott Sheffield

We consider a formal discretisation of Euclidean quantum gravity defined by a statistical model of random $3$-regular graphs and making using of the Ollivier curvature, a coarse analogue of the Ricci curvature. Numerical analysis shows that…

高能物理 - 理论 · 物理学 2021-03-09 Christy Kelly , Carlo Trugenberger , Fabio Biancalana

Liouville first passage percolation (LFPP) with parameter $\xi > 0$ is the family of random distance functions (metrics) $(D_h^{\epsilon})_{\epsilon > 0}$ on $\mathbb{C}$ obtained heuristically by integrating $e^{\xi h}$ along paths, where…

概率论 · 数学 2024-01-17 Charles Devlin VI

We prove that the simple random walk on the uniform infinite planar triangulation (UIPT) typically travels graph distance at most $n^{1/4 + o_n(1)}$ in $n$ units of time. Together with the complementary lower bound proven by Gwynne and…

概率论 · 数学 2020-07-07 Ewain Gwynne , Tom Hutchcroft

We show that for each ${\mathbf c}_{\mathrm M} \in [1,25)$, there is a unique metric associated with Liouville quantum gravity (LQG) with matter central charge ${\mathbf c}_{\mathrm M}$. An earlier series of works by…

概率论 · 数学 2024-01-31 Jian Ding , Ewain Gwynne

We re-examine results of the Liouville theory and provide arguments that a {\it negative} bare cosmological constant is essential to define two-dimensional quantum gravity. From this we are naturally led to a regularization of quantum…

高能物理 - 格点 · 物理学 2007-05-23 Wolfgang Beirl , Bernd A. Berg

Let $(\mathscr{C}, \omega_{\mathscr{C}})$ be a Ricci-flat, simply connected, conical K\"ahler manifold. We establish a Liouville theorem for constant scalar curvature K\"ahler (cscK) metrics on $\mathscr{C}$. The theorem asserts that any…

微分几何 · 数学 2025-02-05 Johan Jacoby Klemmensen

The computation of the correlation numbers in Minimal Liouville Gravity involves an integration over moduli spaces of complex curves. There are two independent approaches to the calculation: the direct one, based on the CFT methods and…

高能物理 - 理论 · 物理学 2016-12-21 Konstantin Aleshkin , Vladimir Belavin

There is a simple way to "glue together" a coupled pair of continuum random trees (CRTs) to produce a topological sphere. The sphere comes equipped with a measure and a space-filling curve (which describes the "interface" between the…

概率论 · 数学 2020-08-20 Bertrand Duplantier , Jason Miller , Scott Sheffield

We investigate the validity of the Liouville property for a class of elliptic equations with a potential, posed on infinite graphs. Under suitable assumptions on the graph and on the potential, we prove that the unique bounded solution is…

偏微分方程分析 · 数学 2023-04-04 Stefano Biagi , Giulia Meglioli , Fabio Punzo

We derive a scaling limit in law for the cover time of a simple random walk on a lattice version of a scaled-up planar domain with wired boundary conditions. The limiting distribution is that of a Gumbel Random Variable shifted randomly by…

概率论 · 数学 2026-02-26 Oren Louidor , Santiago Saglietti

We consider the metric growth in Liouville quantum gravity (LQG) for $\gamma \in (0,2)$. We show that a process associated with the trace of the free field on the boundary of a filled LQG ball is stationary, for every $\gamma \in (0,2)$.…

概率论 · 数学 2022-12-21 Julien Dubédat , Hugo Falconet

The theory of embedded random surfaces, equivalent to two--dimensional quantum gravity coupled to matter, is reviewed, further developed and partly generalized to four dimensions. It is shown that the action of the Liouville field theory…

高能物理 - 理论 · 物理学 2007-05-23 Christof Schmidhuber , Caltech Ph. D. thesis

Liouville Field Theory (LFT for short) is a two dimensional model of random surfaces, which is for instance involved in $2d$ string theory or in the description of the fluctuations of metrics in $2d$ Liouville quantum gravity. This is a…

概率论 · 数学 2017-10-16 Hubert Lacoin , Rémi Rhodes , Vincent Vargas

The three-point functions for minimal models coupled to gravity are derived in the operator approach to Liouville theory which is based on its $U_q(sl(2))$ quantum group structure. The result is shown to agree with matrix-model calculations…

高能物理 - 理论 · 物理学 2009-10-22 Jean-Loup Gervais

A rigorous probabilistic construction of Liouville conformal field theory (LCFT) on the Riemann sphere was recently given by David-Kupiainen and the last two authors. In this paper, we focus on the connection between LCFT and the classical…

概率论 · 数学 2019-03-22 Hubert Lacoin , Rémi Rhodes , Vincent Vargas