def test_falker(self):
        M = diag(array(([1,0,3])))
        K = array(([2,-1,-1],[-1,2,-1],[-1,-1,2]))
        D = array(([1,-1,0],[-1,1,0],[0,0,0]))
        Z = zeros((3,3))
        I = identity(3)
        A = bmat([[I,Z],[Z,-K]])
        B = bmat([[Z,I],[M,D]])

        olderr = np.seterr(all='ignore')
        try:
            self._check_gen_eig(A, B)
        finally:
            np.seterr(**olderr)
Test matrices giving some Nan generalized eigen values.
dataset/ETHPy150Open scipy/scipy/scipy/linalg/tests/test_decomp.py/TestEig.test_falker