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20082026
most citedSmoothing parameter and model selection for general smooth models

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28 papers · 1 filter

math.AP2025

A note on lifespan estimates for higher-order parabolic equations

Nurdaulet N. Tobakhanov, Berikbol T. Torebek

We investigate the lifespan of solutions to the higher-order semilinear parabolic equation with initial data. We focus on the…

math.AP2024

On the critical behavior for the semilinear biharmonic heat equation with forcing term in an exterior domain

Nurdaulet N. Tobakhanov, Berikbol T. Torebek

In this paper, we investigate the critical behavior of solutions to the semilinear biharmonic heat equation with forcing term under six homogeneous boundary conditions. Thi…

math.AP2024

Existence of normalized ground state solution to a mixed Schrödinger system in a plane

Ashutosh Dixit, Amin Esfahani, Hichem Hajaiej +1

In this paper, we establish the existence of positive ground state solutions for a class of mixed Schrödinger systems with concave-convex nonlinearities in , subject…

math.AP2024★ 6 cited

A Hamiltonian Dysthe equation for hydroelastic waves in a compressed ice sheet

Philippe Guyenne, Adilbek Kairzhan, Catherine Sulem

Nonlinear hydroelastic waves along a compressed ice sheet lying on top of a two-dimensional fluid of infinite depth are investigated. Based on a Hamiltonian formulation of this pro…

math.AP2024★ 1 cited

Interaction between long internal waves and free surface waves in deep water

Adilbek Kairzhan, Christopher Kennedy, Catherine Sulem

We consider a density-stratified fluid composed of two immiscible layers separated by a sharp interface. We study the regime of long internal waves interacting with modulated surfa…

math.AP2024

Critical, stability and higher-order analysis for Hardy type inequalities on Cartan-Hadamard manifolds

Prasun Roychowdhury, Durvudkhan Suragan, Nurgissa Yessirkegenov

In this paper, we focus on three main objectives related to Hardy-type inequalities on Cartan-Hadamard manifolds. Firstly, we explore critical Hardy-type inequalities that contain…

math.AP2023

Variational eigenvalues of the subelliptic -Laplacian

Mukhtar Karazym

We use the Lusternik-Schnirelman theory to prove the existence of a nondecreasing sequence of variational eigenvalues for the subelliptic -Laplacian subject to the Dirichlet bou…

math.AP2023★ 2 cited

Subelliptic -Laplacian spectral problem for Hörmander vector fields

Mukhtar Karazym, Durvudkhan Suragan

Based on variational methods, we study the spectral problem for the subelliptic -Laplacian arising from smooth Hörmander vector fields. We derive the smallest eigenvalue, prove…

math.AP2023★ 3 cited

Mixed fully nonlinear local and nonlocal elliptic operators in Heisenberg group

Priyank Oza, Jagmohan Tyagi

We establish the comparison principle, existence and regularity of viscosity solutions to the following problem concerning the mixed operator: \begin{align} \begin{cases} α\mathcal…

math.AP2022★ 4 cited

Fujita exponent on stratified Lie groups

Durvudkhan Suragan, Bharat Talwar

We prove that is the Fujita exponent for a semilinear heat equation on an arbitrary stratified Lie group with homogeneous dimension . This covers the Euclidean c…

math.AP2022★ 1 cited

A note on the quartic generalized Korteweg-de Vries equation in weighted Sobolev spaces

Alejandro J. Castro, Amin Esfahani, Lyailya Zhapsarbayeva

In this paper we establish the persistence property for solutions of the quartic generalized Korteweg-de Vries equation with initial data in weighted Sobolev spaces $H^{s}(\mathbb{…

math.AP2022★ 2 cited

The Nonlinear Schrödinger-Airy equation in weighted Sobolev spaces

Alejandro J. Castro, Khumoyun Jabbarkhanov, Lyailya Zhapsarbayeva

We study the persistence property of the solution for the nonlinear Schrödinger-Airy equation with initial data in the weighted Sobolev space $H^{1/4}(\mathbb{R})\cap L^2(|x|^{2m}d…

math.AP2020★ 6 cited

Principal frequency of p-sub-Laplacians for general vector fields

Michael Ruzhansky, Bolys Sabitbek, Durvudkhan Suragan

In this paper, we prove the uniqueness and simplicity of the principal frequency (or the first eigenvalue) of the Dirichlet p-sub-Laplacian for general vector fields. As a byproduc…

math.AP2020

Representation formulae for the higher-order Steklov and -Friedrichs inequalities

Tohru Ozawa, Durvudkhan Suragan

In this paper, we obtain remainder term representation formulae for the higher-order Steklov inequality for vector fields which imply short and direct proofs of the sharp (classica…

math.AP2020★ 1 cited

Trace formulae of potentials for degenerate parabolic equations

Mukhtar Karazym, Durvudkhan Suragan

In this paper, we analyze main properties of the volume and layer potentials as well as the Poisson integral for a multi-dimensional degenerate parabolic equation. As consequences,…

math.AP2020★ 8 cited

Multidimensional inverse Cauchy problems for evolution equations

Mukhtar Karazym, Tohru Ozawa, Durvudkhan Suragan

We discuss inverse problems to finding the time-dependent coefficient for the multidimensional Cauchy problems for both strictly hyperbolic equations and polyharmonic heat equation…

math.AP2020★ 15 cited

Regularity of Fourier integral operators with amplitudes in general Hörmander classes

Alejandro J. Castro, Anders Israelsson, Wolfgang Staubach

We prove the global -boundedness of Fourier integral operators that model the parametrices for hyperbolic partial differential equations, with amplitudes in classical Hörmande…

math.AP2019★ 3 cited

Regularity properties of Schrödinger integral operators and general oscillatory integrals

Alejandro J. Castro, Anders Israelsson, Wolfgang Staubach +1

We introduce the notion of Schrödinger integral operators and prove sharp local and global regularity results for these (including propagators for the quantum mechanical harmonic o…

math.AP2019

Global well-posedness for the nonlinear wave equation in analytic Gevrey spaces

Daniel Oliveira da Silva, Alejandro J. Castro

We obtain an asymptotic rate of decay for the radius of spatial analyticity of solutions to the nonlinear wave equation with initial data in the analytic Gevrey spaces.

math.AP2018

Weighted anisotropic Hardy and Rellich type inequalities for general vector fields

Michael Ruzhansky, Bolys Sabitbek, Durvudkhan Suragan

In this paper, we establish the weighted anisotropic Hardy and Rellich type inequalities with boundary terms for general (real-valued) vector fields. As consequences, we derive new…

math.AP2018★ 7 cited

A comparison principle for nonlinear heat Rockland operators on graded groups

Michael Ruzhansky, Durvudkhan Suragan

In this note we show a comparison principle for nonlinear heat Rockland operators on graded groups. We give a simple proof for it using purely algebraic relations. As an applicatio…

math.AP2018★ 2 cited

Hardy and Rellich inequalities for anisotropic p-sub-Laplacians

Michael Ruzhansky, Bolys Sabitbek, Durvudkhan Suragan

In this paper we establish the subelliptic Picone type identities. As consequences, we obtain Hardy and Rellich type inequalities for anisotropic p-sub- Laplacians which are operat…

math.AP2018

On geometric estimates for some problems arising from modeling pull-in voltage in MEMS

Durvudkhan Suragan, Dongming Wei

In this paper for all we prove that the pull-in voltage of the -MEMS (micro-electro mechanical systems) problems on a smooth bounded domain of is…

math.AP2017

Transference of local to global maximal estimates for dispersive partial differential equations

Alejandro J. Castro, Salvador Rodríguez-López, Wolfgang Staubach

In this paper we give an elementary proof for transference of local to global maximal estimates for dispersive PDEs. This is done by transferring local estimates for certain…