{"gt_parse": {"text_sequence": "uct on . Nor mal Hermit ian a nd real-s ymm etri c matrices have s everal useful pro pertiesIt is possible for a real or complex matrix to h ave all real eigenvalues without bein g Hermitian. For example, a real tria ngular matrix has its eigenvalues al ong its diagonal, but in g eneral is not symme tric.Condition number.Any problem of numeric calculation can be view ed as the eva lu ati on o f some funct ion for som"}}