$hessian                                                                        
        0.2532452571   0.0771584816  -0.1966597486  -0.0640073770  -0.1054714382
       -0.0002167001  -0.1892378801   0.0283129566   0.1968764487
        0.0771584816   0.4351339518   0.1791105969  -0.1400425460  -0.3763941880
       -0.0850417884   0.0628840645  -0.0587397638  -0.0940688085
       -0.1966597486   0.1791105969   0.2915204657  -0.0202919580  -0.1180047820
       -0.0491766928   0.2169517066  -0.0611058149  -0.2423437729
       -0.0640073770  -0.1400425460  -0.0202919580   0.0564086315   0.1105272594
        0.0103978697   0.0075987455   0.0295152866   0.0098940883
       -0.1054714382  -0.3763941880  -0.1180047820   0.1105272594   0.3900602852
        0.1211199678  -0.0050558212  -0.0136660972  -0.0031151858
       -0.0002167001  -0.0850417884  -0.0491766928   0.0103978697   0.1211199678
        0.0604195181  -0.0101811696  -0.0360781794  -0.0112428253
       -0.1892378801   0.0628840645   0.2169517066   0.0075987455  -0.0050558212
       -0.0101811696   0.1816391347  -0.0578282433  -0.2067705370
        0.0283129566  -0.0587397638  -0.0611058149   0.0295152866  -0.0136660972
       -0.0360781794  -0.0578282433   0.0724058611   0.0971839943
        0.1968764487  -0.0940688085  -0.2423437729   0.0098940883  -0.0031151858
       -0.0112428253  -0.2067705370   0.0971839943   0.2535865982
