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3D Crouzeix-Raviart mortar finite element method

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from 3D Crouzeix-Raviart mortar finite element method by Jan Valdman
Implementation of 3D Crouzeix-Raviart mortar finite element

value=exact_solution(point) 
function value=exact_solution(point)


x=point(:,1);
y=point(:,2);
z=point(:,3);

%onesvector=ones(size(x));
%x_shifted=onesvector-x;
%y_shifted=onesvector-y;
%value=(x.*x_shifted).*(y.*y_shifted);
value=sin(pi*x).*sin(pi*y).*sin(pi*z);

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