@PhDThesis{	  itlic:2001-014,
  author	= {Abraham Zemui},
  title		= {Fourth Order Symmetric Finite Difference Schemes for the
		  Wave Equation},
  school	= {Department of Information Technology, Uppsala University},
  department	= {Division of Scientific Computing},
  year		= {2001},
  number	= {2001-014},
  type		= {Licentiate thesis},
  month		= dec,
  abstract	= {The solution of the acoustic wave equation in one space
		  dimension is studied. The PDE is discretized using finite
		  element approximation. A cubic piecewise Lagrange
		  polynomial is used as basis. Consistent finite element and
		  lumped mass schemes are obtained. These schemes are
		  interpreted as finite difference schemes. Error analysis is
		  given for these finite differences (only for constant
		  coefficients).}
}