  On meshes with the maximum angle condition violated, the
  standard conforming, nonconforming, and discontinuous Galerkin finite
elements
  do not converge to the true solution when the mesh size goes to zero.
  It is shown that one type of weak Galerkin finite element method converges
  on triangular and tetrahedral meshes violating the maximum angle condition,
  i.e., on arbitrary meshes.
  Numerical tests confirm the theory.
