EAS 501-01 Homework I

%%%This is for part a for problem 1.
    A=zeros(8,8);
    for j=1:8
    for k=1:8
    if j==k
    A(j,k)=-2;
    end
    if abs(j-k)==1
    A(j,k)=1;
    end
    end
    end
    [L,U]=lu(A) %%%Proving L and U.
    L*U %%%Proving that L*U=A, thus it is correct.
    %%% This is for part b for problem 1.
    det(U)
    det(A)