/usr/share/octave/site/m/sundialsTB/idas/function_types/IDAJacTimesVecFnB.m is in octave-sundials 2.5.0-3+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | %IDAJacTimesVecFn - type for Jacobian times vector function for backward problems.
%
% The function JTVFUNB must be defined either as
% FUNCTION [JVB,FLAG] = JTVFUNB(T,YY,YP,YYB,YPB,RRB,VB,CJB)
% or as
% FUNCTION [JVB,FLAG,NEW_DATA] = JTVFUNB(T,YY,YP,YYB,YPB,RRB,VB,CJB,DATA)
% depending on whether a user data structure DATA was specified in
% IDAInit. In either case, it must return the vector JVB, the
% product of the Jacobian (dfB/dyyB + cj * dfB/dypB) and a vector
% vB. The input argument RRB contains the current value of f(t,yy,yp,yyB,ypB).
%
% The function JTVFUNB must set FLAG=0 if successful, or FLAG~=0 if
% a failure occurred.
%
% See also IDASetOptions
%
% NOTE: JTVFUNB is specified through the property JacobianFn to IDASetOptions
% and is used only if the property LinearSolver was set to 'GMRES', 'BiCGStab',
% or 'TFQMR'.
% Radu Serban <radu@llnl.gov>
% Copyright (c) 2007, The Regents of the University of California.
% $Revision: 1.2 $Date: 2011/05/26 00:01:23 $
|