Question

Construct its corresponding Laplacian matrix

Given is the following graph


(1) Construct its corresponding Laplacian matrix.

(2) From the previous exercise sheet we know that {1, 2, 3}, {4, 5, 6} is (one of) the

best partition(s) into two classes. Construct the corresponding vector f.

 Verify the equation

        f>Lf = |V|.RatioCut(A, A hat)

    for this particular choice of f.

 Show that f is orthogonal to the all-one-vector and that ||f||^2 = n holds.



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