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%%                                                             %
%%  Definition av diffusions-koefficienten a(x) i ekvationen   %
%%                                                             %
%%      -(a(x)*u'(x))' + c(x)*u(x) = f(x)                      %
%%                                                             %
%%  Variabler:  x           reellt tal                         %
%%              diffusion   reellt tal                         %  
%%                                                             %
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function diffusion = a(x)

% Funktionen  a(x)
%
% Exempel:  diffusion = 1;

diffusion = 1;
