activity
20192026
most citedA note on the extremal noncentral sections of the cross-polytope

1 citations · 3 across the 15 of their papers we have counts for

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math.AP2026

On the Smoluchowski-Kramers approximation for the hyperbolic linear sigma model and its mean-field limit

Alexander Czernik, Ruoyuan Liu, Shao Liu

We study the hyperbolic linear sigma model, i.e. a system of interacting stochastic damped nonlinear wave equations (SdNLW) with coupled cubic nonlinearities, posed on t…

math.AP2025

Hyperbolic linear sigma model and its mean-field limit

Ruoyuan Liu, Shao Liu, Tadahiro Oh

We study large limits of the hyperbolic linear sigma model () on the two-dimensional torus , namely, a system of interacting stochastic d…

math.AP2025

Large torus limit of global dynamics of the two-dimensional dispersive Anderson model

Ruoyuan Liu, Nikolay Tzvetkov

We continue the study of the two-dimensional dispersive Anderson model (DAM), i.e. the nonlinear Schrödinger equation with multiplicative spatial white noise. For this model, globa…

math.AP2023

Global dynamics for the stochastic nonlinear beam equations on the four-dimensional torus

Andreia Chapouto, Guopeng Li, Ruoyuan Liu

We study global-in-time dynamics of the stochastic nonlinear beam equations (SNLB) with an additive space-time white noise, posed on the four-dimensional torus. The roughness of th…

math.AP2023

Global well-posedness of one-dimensional cubic fractional nonlinear Schrödinger equations in negative Sobolev spaces

Enguerrand Brun, Guopeng Li, Ruoyuan Liu +1

We study the Cauchy problem for the cubic fractional nonlinear Schrödinger equation (fNLS) on the real line and on the circle. In particular, we prove global well-posedness of the…

math.AP2023

Existence, uniqueness, and universality of global dynamics for the fractional hyperbolic -model

Ruoyuan Liu, Nikolay Tzvetkov, Yuzhao Wang

We study the fractional -measure (with order ) and the dynamical problem of its canonical stochastic quantization: the three-dimensional stochastic damped fractional n…

math.AP2023★ 1 cited

Global well-posedness of the energy-critical stochastic nonlinear wave equations

Enguerrand Brun, Guopeng Li, Ruoyuan Liu

We consider the Cauchy problem for the defocusing energy-critical stochastic nonlinear wave equations (SNLW) with an additive stochastic forcing on and $\mathbb{T}…

math.AP2023

Global well-posedness of the 2D nonlinear Schrödinger equation with multiplicative spatial white noise on the full space

Arnaud Debussche, Ruoyuan Liu, Nikolay Tzvetkov +1

We consider the nonlinear Schrödinger equation with multiplicative spatial white noise and an arbitrary polynomial nonlinearity on the two-dimensional full space domain. We prove g…

math.AP2022

Local well-posedness of the periodic nonlinear Schrödinger equation with a quadratic nonlinearity in negative Sobolev spaces

Ruoyuan Liu

We study low regularity local well-posedness of the nonlinear Schrödinger equation (NLS) with the quadratic nonlinearity , posed on one-dimensional and two-dimensio…

math.AP2022

On the probabilistic well-posedness of the two-dimensional periodic nonlinear Schrödinger equation with the quadratic nonlinearity

Ruoyuan Liu

We study the two-dimensional periodic nonlinear Schrödinger equation (NLS) with the quadratic nonlinearity . In particular, we study the quadratic NLS with random initial da…

math.AP2022

Global well-posedness of the two-dimensional stochastic viscous nonlinear wave equations

Ruoyuan Liu

We study well-posedness of viscous nonlinear wave equations (vNLW) on the two-dimensional torus with a stochastic forcing. In particular, we prove pathwise global well-posedness of…

math.AP2022

Sharp local well-posedness of the two-dimensional periodic nonlinear Schrödinger equation with a quadratic nonlinearity

Ruoyuan Liu, Tadahiro Oh

We study the nonlinear Schrödinger equation (NLS) with the quadratic nonlinearity , posed on the two-dimensional torus . While the relevant -Strichartz es…

math.AP2021★ 1 cited

On the two-dimensional singular stochastic viscous nonlinear wave equations

Ruoyuan Liu, Tadahiro Oh

We study the stochastic viscous nonlinear wave equations (SvNLW) on , forced by a fractional derivative of the space-time white noise . In particular, we consider S…