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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA -
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
function Sl2=bilin(Sl1,v)
[A,B,C,D]=abcd(Sl1);
dom=Sl1("dt");
[ra,ca] = size(A);
a=v(1);d=v(2);c=v(3);b=v(4);
i=inv(a*eye(ra,ra)-c*A);
AB=(b*A-d*eye(ra,ra))*i;
BB=(a*b-c*d)*i*B;
CB=C*i;
DB=D+c*C*i*B;
if dom=="c" then Sl2=syslin("d",AB,BB,CB,DB);
else Sl2=syslin("c",AB,BB,CB,DB);end
endfunction
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