$L^2$ estimates for weak Galerkin finite element methods for second-order wave equations with polygonal meshes

Finite element, Rayleigh-Ritz and Galerkin methods for initial value and initial-boundary value problems involving PDEs (65M60) Error bounds for initial value and initial-boundary value problems involving PDEs (65M15)

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\(L^2\) estimates for weak Galerkin finite element methods for second-order wave equations with polygonal meshes