def METHOD_NAME(m4):
    k1 = m4[1,0]
    k2 = m4[2,0]
    k3 = m4[3,0]
    k4 = m4[2,1]
    k5 = m4[3,1]
    k6 = m4[3,2]
    # Test that it is really an antisymmetric matrix
    tol = 1e-12
    for i in range(4):
        assert(abs(m4[i,i]) < tol)
    for (i,j) in [(1,0), (2,0), (3,0), (1,2), (1,3), (2,3)]:
        assert(abs(m4[i,j] + m4[j,i]) < tol)
    return k1, k2, k3, k4, k5, k6