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TSTTHETAFUNJAC1.m

## Copyright (C) 2008  Carlo de Falco            
##
## This file is part of:
## OCS - A Circuit Simulator for Octave
##
## OCS is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program (see the file LICENSE); if not,
## see <http://www.gnu.org/licenses/>.
##
## author: Carlo de Falco <cdf _AT_ users.sourceforge.net>

## -*- texinfo -*-
##
## @deftypefn{Function File} @
## {[@var{lhs}]=} TSTTHETAFUNJAC1@
## (@var{outstruct}, @var{x}, @var{t0}, @var{t1}, @var{A0}, @var{B}, @
## @var{theta}, @var{A1}, @var{Jac}, @var{res})
##
## INTERNAL FUNCTION: NOT SUPPOSED TO BE CALLED DIRECTLY BY USERS
## @end deftypefn

function lhs = TSTTHETAFUNJAC1(outstruct, x, t0, t1, A0, B, theta, A1, Jac, res)

  DT = t1-t0;
  if ( nargin < 10 )
    [A1,Jac,res] = ASMbuildsystem(outstruct,x,t1); 
  endif
  lhs = ( (A0+A1)/DT + theta*(B + Jac) ); 

endfunction

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