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This paper introduces an efficient stabilizer-free weak Galerkin (WG) finite element method for solving the three-dimensional quad-curl problem. Leveraging bubble functions as a key analytical tool, the method extends the applicability of…

Numerical Analysis · Mathematics 2025-02-13 Chunmei Wang , Shangyou Zhang

In this paper, we present and analyze a weak Galerkin finite element (WG) method for solving the symmetric hyperbolic systems. This method is highly flexible by allowing the use of discontinuous finite elements on element and its boundary…

Numerical Analysis · Mathematics 2020-11-24 Tie Zhang , Shangyou Zhang

A stabilizer free weak Galerkin (WG) finite element method on polytopal mesh has been introduced in Part I of this paper (J. Comput. Appl. Math, 371 (2020) 112699. arXiv:1906.06634.) Removing stabilizers from discontinuous finite element…

Numerical Analysis · Mathematics 2020-09-01 Xiu Ye , Shangyou Zhang

This paper presents a simple weak Galerkin (WG) finite element method for the Reissner-Mindlin plate model that partially eliminates the need for traditionally employed stabilizers. The proposed approach accommodates general, including…

Numerical Analysis · Mathematics 2025-12-11 Chunmei Wang , Shangyou Zhang

We introduce a new numerical method for solving time-harmonic Maxwell's equations via the modified weak Galerkin technique. The inter-element functions of the weak Galerkin finite elements are replaced by the average of the two…

Numerical Analysis · Mathematics 2023-08-08 Chunmei Wang , Xiu Ye , Shangyou Zhang

A weak Galerkin (WG) finite element method without stabilizers was introduced in [J. Comput. Appl. Math., 371 (2020). arXiv:1906.06634] on polytopal mesh. Then it was improved in [arXiv:2008.13631] with order one superconvergence. The goal…

Numerical Analysis · Mathematics 2020-09-21 Xiu Ye , Shangyou Zhang

In this paper a hybridized weak Galerkin (HWG) finite element method for solving the Stokes equations in the primary velocity-pressure formulation is introduced. The WG method uses weak functions and their weak derivatives which are defined…

Numerical Analysis · Mathematics 2023-07-19 Qilong Zhai , Ran Zhang , Xiaoshen Wang

The weak Galerkin (WG) finite element method is an effective and flexible general numerical techniques for solving partial differential equations. A simple weak Galerkin finite element method is introduced for second order elliptic…

Numerical Analysis · Mathematics 2020-04-24 Ahmed Al-Taweel , Xiaoshen Wang , Xiu Ye , Shangyou Zhang

This article proposes a novel least-squares weak Galerkin (LS-WG) method for second-order elliptic equations in non-divergence form. The approach leverages a locally defined discrete weak Hessian operator constructed within the weak…

Numerical Analysis · Mathematics 2026-05-13 Chunmei Wang , Shangyou Zhang

This article is devoted to computing the eigenvalue of the Laplace eigenvalue problem by the weak Galerkin (WG) finite element method with emphasis on obtaining lower bounds. The WG method is on the use of weak functions and their weak…

Numerical Analysis · Mathematics 2015-08-24 Hehu Xie , Qilong Zhai , Ran Zhang

This paper presents a hybridized formulation for the weak Galerkin mixed finite element method (WG-MFEM) which was introduced and analyzed for second order elliptic equations. The WG-MFEM method was designed by using discontinuous piecewise…

Numerical Analysis · Mathematics 2015-08-25 Lin Mu , Junping Wang , Xiu Ye

A discrete divergence-free weak Galerkin finite element method is developed for the Stokes equations based on a weak Galerkin (WG) method introduced in the reference [15]. Discrete divergence-free bases are constructed explicitly for the…

Numerical Analysis · Mathematics 2016-03-01 Lin Mu , Junping Wang , Xiu Ye

Weak Galerkin (WG) refers to general finite element methods for partial differential equations in which differential operators are approximated by weak forms through the usual integration by parts. In particular, WG methods allow the use of…

Numerical Analysis · Mathematics 2011-11-04 Lin Mu , Junping Wang , Xiu Ye , Shan Zhao

This paper presents a new weak Galerkin (WG) method for elliptic interface problems on general curved polygonal partitions. The method's key innovation lies in its ability to transform the complex interface jump condition into a more…

Numerical Analysis · Mathematics 2023-10-12 Dan Li , Chunmei Wang , Shangyou Zhang

This paper introduces and rigorously analyzes a least-squares weak Galerkin (LS-WG) finite element method for the severely ill-posed Cauchy problem associated with the Helmholtz equation. By utilizing a weak Laplacian operator defined on a…

Numerical Analysis · Mathematics 2026-05-21 Chunmei Wang , Shangyou Zhang

The weak Galerkin (WG) methods have been introduced in the references [11, 16] for solving the biharmonic equation. The purpose of this paper is to develop an algorithm to implement the WG methods effectively. This can be achieved by…

Numerical Analysis · Mathematics 2016-03-01 Lin Mu , Junping Wang , Xiu Ye

A weak Galerkin (WG) method is introduced and numerically tested for the Helmholtz equation. This method is flexible by using discontinuous piecewise polynomials and retains the mass conservation property. At the same time, the WG finite…

Numerical Analysis · Mathematics 2016-08-24 Lin Mu , Junping Wang , Xiu Ye , Shan Zhao

This paper develops a weak Galerkin (WG) finite element method of arbitrary order for the steady incompressible Magnetohydrodynamics equations. The WG scheme uses piecewise polynomials of degrees $k(k\geq 1),k,k-1$, and $k-1$ respectively…

Numerical Analysis · Mathematics 2023-10-06 Min Zhang , Tong Zhang , Xiaoping Xie

This article introduces a new primal-dual weak Galerkin (PDWG) finite element method for second order elliptic interface problems with ultra-low regularity assumptions on the exact solution and the interface and boundary data. It is proved…

Numerical Analysis · Mathematics 2020-10-29 Waixiang Cao , Chunmei Wang , Junping Wang

A conforming discontinuous Galerkin (DG) finite element method has been introduced in [21] on simplicial meshes, which has the flexibility of using discontinuous approximation and the simplicity in formulation of the classic continuous…

Numerical Analysis · Mathematics 2019-07-11 Xiu Ye , Shangyou Zhang