@TechReport{	  it:2014-004,
  author	= {Emil Kieri},
  title		= {Stiff Convergence of Force-Gradient Operator Splitting
		  Methods},
  institution	= {Department of Information Technology, Uppsala University},
  department	= {Division of Scientific Computing},
  year		= {2014},
  number	= {2014-004},
  month		= feb,
  abstract	= {We consider force-gradient, also called modified
		  potential, operator splitting methods for problems with
		  unbounded operators. We prove that force-gradient operator
		  splitting schemes retain their classical orders of accuracy
		  for time-dependent partial differential equations of
		  parabolic or Schr{\"o}dinger type, provided that the
		  solution is sufficiently regular.}
}