%0 Journal Article
%T Geometry of Numerical Complex Time Integration
%A Thorsten Orendt
%A Jščrgen Richter-Gebert
%A Michael Schmid
%J Mathematics
%D 2009
%I arXiv
%X We are studying Runge-Kutta methods along complex paths of integration from a geometric point of view. Thereby we derive special complex time grids, which applied to the problem of integrating a linear autonomous system of ordinary differential equations, can be used to achieve a classical superconvergence effect. The approach is also adapted for arbitrary ODEs. Furthermore we draw a connection from our geometric reasoning to the class of composition methods with complex coefficients. Thereby, our main goal is to introduce a new point of view on these methods.
%U http://arxiv.org/abs/0903.1585v1