/usr/share/octave/site/m/sundialsTB/cvodes/function_types/CVBandJacFnB.m is in octave-sundials 2.5.0-3+b1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | %CVBandJacFnB - type for user provided banded Jacobian function for backward problems.
%
% The function BJACFUNB must be defined either as
% FUNCTION [JB, FLAG] = BJACFUNB(T, Y, YB, FYB)
% or as
% FUNCTION [JB, FLAG, NEW_DATA] = BJACFUNB(T, Y, YB, FYB, DATA)
% depending on whether a user data structure DATA was specified in
% CVodeInit. In either case, it must return the matrix JB, the
% Jacobian of fB(t,y,yB), with respect to yB. The input argument
% FYB contains the current value of f(t,y,yB).
%
% The function BJACFUNB must set FLAG=0 if successful, FLAG<0 if an
% unrecoverable failure occurred, or FLAG>0 if a recoverable error
% occurred.
%
% See also CVodeSetOptions
%
% See the CVODES user guide for more informaiton on the structure of
% a banded Jacobian.
%
% NOTE: BJACFUNB is specified through the property JacobianFn to
% CVodeSetOptions and is used only if the property LinearSolver
% was set to 'Band'.
% Radu Serban <radu@llnl.gov>
% Copyright (c) 2005, The Regents of the University of California.
% $Revision: 1.2 $Date: 2011/06/01 20:44:05 $
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