Automatic Continuation with Deferred Corrections The package ACDC (which is written in FORTRAN 77) is designed to solve stiff two-point boundary value problems for ordinary dierential equations by using continuation. We note that ACDC is a modiffcation of the package TWPBVP of Cash and M. H. Wright and that many of the original subroutines used in TWPBVP remain unchanged in the new code. ACDC has been adapted to allow an automatic continuation strategy to be used. Furthermore, the new code incorporates implicit Runge-Kutta formulae, based on Lobatto points,rather than the mono-implicit formulae used in the original code. This code is a companion to the continuation code COLMOD, which implements our continuation strategy together with a high-order collocation method.

probl.ps
ACDC.f
Automatic Continuation with Deferred Corrections .pdf

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