%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                      %
%   Gewoehnliche Differentialgleichungen                               %
%                                                                      %
%    -- Eine Einfuehrung aus der Perspektive der Dynamischen Systeme   %
%                                                                      %
%                                             Vieweg + Teubner, 2009   %
%                                                                      %
%                                                                      %
%                                                                      %
%  MATLAB-File 'bsp2_f.m' zur Differentialgleichung (B.2), Anhang B.1  %
%                                                                      %
%                                   (C) Lars Gruene, Oliver Junge 2008 %
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function y = bsp2_f(t,x)

y = zeros(2,1);

y(1) =   x(2);
y(2) =  -x(1);
